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The Need For Speed Challenge

The (N)eed (F)or (S)peed Challenge issued by SETI.USA team and will start from 2014-06-21 00:00 UTC to 2014-06-26 00:00 UTC. All teams are invited to join the challenge.

Stats can be followed here: http://boincstats.com/en/stats/challenge/team/chat/557

Don't forget that team leader should be register at boincstats so that the team can be added to the challenge.

We hope to see all teams gathered to crunch some NFS@Home wu's and to increase their badge status.

Best of luck!
2 Jun 2014, 18:51:48 UTC
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3,766+ factored

3,766+ has been factored. It is the product of 66-digit, 75-digit, and 76-digit prime numbers. This is a new Cunningham project champion for GNFS. Let's now set a new record with 3,697+!
1 Apr 2014, 22:34:13 UTC
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Credit badges added

User and team badges for total credit since the beginning of the project and for individual app credits since I started tracking them a couple of days ago have been implemented. Details about the badge levels are at http://escatter11.fullerton.edu/nfs/forum_thread.php?id=457. Let's get sieving for the individual app badges!
6 Jan 2014, 8:11:56 UTC
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Badges

I've updated to the latest BOINC server code, which now supports badges! Badges have been assigned to users and teams with the top 1%, 5%, and 25% recent average credit. These badge assignments will be updated daily. Thanks for your contributions!
28 Dec 2013, 3:02:59 UTC
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Server upgrade complete

The server upgrade is now complete. The entire site should now be much more responsive, and we should be able to handle many more users. Thanks for your patience!
14 Dec 2013, 1:11:32 UTC
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Server upgrade

The server will soon be going offline for a few hours for a server upgrade. If you find the site is down, be assured that it will be back soon.
9 Dec 2013, 22:40:44 UTC
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10,770M factors

10,770M has been factored. It is the product of 102-digit and 111-digit prime numbers. This is a new Cunningham project champion for GNFS. Thanks again for stepping up to the plate and helping finish this one before the end of the grant year on Oct. 1!
18 Sep 2013, 18:38:06 UTC
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7,394+ factored

7,394+ has been factored. It is the product of 71-digit and and 126-digit prime numbers. 10,770M is nearly complete, and the sieving of 3,766+ is going well.
17 Sep 2013, 5:41:06 UTC
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Upcoming outage

The campus has announced a planned network outage from Friday, August 16, at 7pm to Saturday, August 17, at 7am Pacific Time. The project will be unavailable during this time. We apologize in advance for the inconvenience.
12 Aug 2013, 21:22:22 UTC
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3,745+ and 3,706+ factors

Both 3,745+ and 3,706+ have been completed. 3,745+ was the product of 62-digit and 140-digit prime numbers, and 3,706+ was the product of 62-digit and 145-digit prime numbers. These are the new first and second place Cunningham project champions for GNFS.
4 Aug 2013, 8:21:20 UTC
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Unscheduled downtime, August Heat challenges

There was unscheduled downtime today due to a campus-wide power outage. All is now back up and operational.

We have upcoming challenges at BOINCStats. Be sure to join in the challenge, boost your team in the stats, and have some fun!
31 Jul 2013, 0:05:03 UTC
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Calling all 64-bit Linux sievers!

To finish the 10M770 in this grant period, the 64-bit Linux 16e v5 sieving speed needs to **triple** for the next couple of months.

If you have a 64-bit linux machine free, please consider contributing to the sieving. If you are contributing using 64-bit linux computers, consider changing their "location" in the host details screen linked from http://escatter11.fullerton.edu/nfs/hosts_user.php to a currently unused one, then setting that location to get only lasieve5f workunits in your NFS@Home Preferences at http://escatter11.fullerton.edu/nfs/prefs.php?subset=project.

Finally, let other potential contributors know that we can use their help for the next two months. Thanks!
20 Jul 2013, 20:08:55 UTC
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2,1049+ factors

2,1049+, our second largest factorization, is now complete. It was the product of 104-digit and 115-digit prime numbers. Likewise, L1803 and L1809 are also complete. 3,745+ is postprocessing now, and the sieving of 3,706+ is going well.
5 Jun 2013, 20:25:20 UTC
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New Windows x64 apps deployed

Building on the work of Dan_Ee, I have compiled and deployed new Windows x64 apps. These are 50% to 100% faster than the 32-bit apps depending on your processor. Please let me know if you encounter problems.
7 May 2013, 22:40:57 UTC
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kilobit postprocessing underway, factorizations completed

The postprocessing of 2,1049+, our fourth kilobit factorization, is now underway and is expected to take about 4 weeks. The factorizations of F1229 and L1797 have been completed. We will now be working on successively harder GNFS factorizations, and the sieving of our first, 3,745+, is going well.
29 Apr 2013, 23:38:26 UTC
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Upcoming BOINC challenges and completed factorizations

Starting at the stroke of midnight (UTC) on April 1, NFS@Home will be hosting the April Showers challenge at BOINCstats. If you haven't done so already, be sure to encourage your team to participate!

In other news, the factorizations of F1821 and F1839 have been completed. Thanks again for all of your contributions!
29 Mar 2013, 23:06:29 UTC
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F1797 factored

The Fibonacci number F1797 has been factored. It is the product of 112-digit and 136-digit prime numbers.
6 Mar 2013, 1:43:39 UTC
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5233,71- factored

5233,71- has been factored. It is the product of 93-digit and 169-digit prime numbers.
4 Mar 2013, 23:45:19 UTC
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BOINC server updated

The BOINC server software has been updated to the latest version. Please let me know if you encounter any problems.
27 Feb 2013, 22:44:52 UTC
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2,1037- factored

2,1037- has been factored into three factors. It is the product of 67-digit, 86-digit, and 137-digit prime numbers. The sieving of 2,1049+ is going well. Thanks again to all who make this project a success!
31 Jan 2013, 1:25:24 UTC
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11,301- and 3617523089023,19- factored, 2,1037- postprocessing

11,301- and 3617523089023,19- have each been factored into their prime cofactors, and have been reported to the Cunningham and OddPerfect projects respectively.

Thanks to your participation, the December to Remember challenge certainly was one to remember! The surge in computing power allowed us to complete the sieving of 2,1037- before the end of 2012. It is now in postprocessing on the Trestles cluster at the San Diego Supercomputing Center and should finish in a few weeks.

Thanks again for all of your contributions! You are the key to the success of this project.
19 Jan 2013, 19:32:09 UTC
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One billion credits!

The NFS@Home project is on track to surpass 1,000,000,000 credits awarded today! As a CPU-only project, this is a significant milestone for us. Thanks for all of your hard work and dedication to the project!
18 Dec 2012, 19:30:19 UTC
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December to Remember Challenge continues

Part II of the December to Remember Challenge continues today. Let's keep sieving and finish 2,1037- this year!
18 Dec 2012, 19:02:56 UTC
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11,301+ factored

11,301+ has been factored into 104-digit and 107-digit prime numbers. The challenge is going very well with nearly 8.5 teraflops of computing power devoted to NFS sieving. The server is a little slow, but it's keeping up with the work. If this rate continues the sieving of 2,1037- will be complete before the end of this year!
17 Dec 2012, 21:15:37 UTC
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December to Remember Challenge

Be sure to sign your team up for the NFS@Home December to Remember! Challenge at BOINCstats. It has just started, but it's not too late!
11 Dec 2012, 0:22:26 UTC
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1723,83- factored

1723,83- has been factored into 87-digit and 180-digit prime numbers. The sieving of 2,1037- is going well, and a total of 50 numbers have been factored thus far with lasieved. Thanks for all of your help!
27 Nov 2012, 7:05:56 UTC
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3,725+ factored

3,725+ has been factored into 79-digit and 102-digit prime numbers using GNFS. The sieving of 2,1037- is progressing nicely.
15 Oct 2012, 17:43:54 UTC
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2,1019- factored

As expected, 2,1019- finished this week. It has been factored into 76-digit and 171-digit prime numbers. Thanks again to all the volunteers who make these efforts possible!
12 Oct 2012, 21:14:31 UTC
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We'll be back in a couple of hours...

We had a hard drive failure. No data was lost, the drive has been replaced, and I'm taking the project down for a couple of hours to allow the RAID array to rebuild more quickly. We'll be back shortly...
11 Oct 2012, 21:10:17 UTC
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3,637+ factored

3,637+ has been factored into 63-digit, 66-digit, and 109-digit prime numbers. The postprocessing for 2,1019- is going well and should finish before this weekend.
9 Oct 2012, 21:44:48 UTC
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3,637- factored, NSF grant renewed

3,637- has been factored into 85-digit and 127-digit prime numbers. In other news, the National Science Foundation XSEDE grant has been renewed for another year, so we have lots of sieving to do! We can use as much computing time as you have available to donate, and your help is greatly appreciated!
23 Sep 2012, 4:48:14 UTC
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Puzzle solved!

The composite cofactor of the RSA public key factored into 91-digit and 97-digit prime numbers. With these factors, we are able to decrypt the RSA-encrypted literary quote. What quote did Donald Knuth hide so well?

His remarks (as reported) were as follows:--

"O Rowty-owty tiddly-owty

Tiddly-owty tiddly-owty

Highty-ighty tiddly-ighty

Tiddly-ighty ow."

--G. K. Chesterton (1905)

This is from *The Tremendous Adventures of Major Brown*, the first in the collection of short stories *The Club of Queer Trades*.
15 Sep 2012, 20:48:12 UTC
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3,635+ factored

3,635+ has been factored into 94-digit and 99-digit prime numbers. The RSALS merger is going smoothly, and we have already factored 10 RSALS-sized numbers!
22 Aug 2012, 23:47:40 UTC
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Welcome RSALS sievers!

As announced on their website, the RSALS project is merging into NFS@Home. The RSALS infrastructure has been integrated into NFS@Home, including the familiar Current jobs page. Also, Lionel from RSALS will continue to administer this subproject. If you wish to only participate in RSALS projects on NFS@Home, then make sure to enable only the lasieved app in your NFS@Home Preferences. However, if your computer has sufficient memory, you are welcome to contribute to the harder projects as well. **Welcome aboard!**
16 Aug 2012, 21:31:12 UTC
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Bernoulli(200) factored

The numerator of Bernoulli(200) has been factored into 90-digit and 115-digit prime numbers. The final processing was done by Emmanuel Thome and Paul Zimmermann with CADO-NFS using the Grid 5000 platform.
6 Aug 2012, 7:54:34 UTC
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Puzzle time!

In the second volume of The Art of Computer Programming, Donald Knuth included a puzzle. A literary quotation is encrypted using the RSA algorithm, and we will decrypt it by factoring the public encryption key! This effort will use the lower-memory lasievee application, so more of you will be able to participate. The workunits for this challenge start with Gtaocp, and they will start going out shortly. Let's crack this as quickly as possible!
5 Aug 2012, 6:25:21 UTC
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New SNFS record!

2,1061- has been factored into 143-digit and 177-digit prime numbers. This is a new record for the largest ever SNFS factorization, and is a new Cunningham champion in three categories!
4 Aug 2012, 19:08:44 UTC
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3,625- factored

3,625- has been factored into 72-digit and 135-digit prime numbers. The new Mac OS X and FreeBSD apps are working well. If you have had trouble with NFS@Home on these platforms in the past, I encourage you to give us another try!
29 Jul 2012, 1:57:05 UTC
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64-bit FreeBSD app released

For FreeBSD fans, a native FreeBSD app has been released for x86_64 processors. It should work with FreeBSD 7+ as long as the COMPAT_FREEBSD7 kernel option has not been disabled. Thanks go to FreeBSD Daemon for his assistance in creating this port.
19 Jul 2012, 7:01:57 UTC
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197,113- factored

197,113- is now factored into 117-digit and 141-digit prime numbers.
9 Jul 2012, 23:46:15 UTC
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7,365- factored

7,365- is now factored into 97-digit and 125-digit prime numbers.
3 Jul 2012, 6:20:40 UTC
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59,149- factored

59,149- is now factored into 101-digit and 162-digit prime numbers. The sieving of B200 is complete and postprocessing has begun, and 7,365- will likely finish this weekend.
30 Jun 2012, 3:58:26 UTC
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64-bit Mac OS X app now supports OS X 10.5 as well

After learning more than I wanted to know about compiling in Mac OS X, the 64-bit sieve now supports OS X 10.5+. If you are using OS X 10.5, please give it a try and report any problems that you experience. Thanks!
4 Jun 2012, 15:18:53 UTC
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64-bit Mac OS X app released

A 64-bit Mac OS X app has been released. It uses less memory and is much faster than the older 32-bit app for Mac. Note that this was built with Xcode 4.0, and requires Mac OS X 10.6 Snow Leopard or greater. It will not run with 10.5 Leopard.
2 Jun 2012, 0:37:47 UTC
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10,305+ factored

10,305+ is now factored into 75-digit and 135-digit prime numbers. The sieving of 2,1061- is nearly complete. (Really this time!) The sieving of B200 is going well, and once the sieving of 2,1061- is done the V5 applications will also be used to sieve B200. Let's get B200 done as quickly as possible!
28 May 2012, 4:46:47 UTC
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Help needed to factor Bernoulli(200)!

Barry Mazur and William Stein wish to include the factors of the numerator of the 200th Bernoulli number in their upcoming book, and you can help! This is a large GNFS factorization, but NFS@Home has the ability to sieve it in 2-3 months. Therefore, I am placing 2,1019- on hold for a bit. If you have the memory for it please use the lasievef application help factor B200, and let's complete it as quickly as possible!
8 May 2012, 5:08:50 UTC
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11,290+ factored

As predicted, 11,290+ finished today. It has been factored into 91-digit and 110-digit prime factors.
28 Apr 2012, 22:53:42 UTC
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5,433+ factored

5,433+ has been factored into 133-digit and 139-digit prime factors. This sets a third place record for SNFS difficulty and a first place record for largest penultimate factor for the Cunningham project! The sieving of 2,1061- is going well using the new app for 64-bit Linux, as is the sieving of 10,305+ and 2,1019- using the traditional apps. 11,290+ is in postprocessing and should finish this weekend.
25 Apr 2012, 7:43:10 UTC
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2,1000+ factored

2,1000+ is now factored into 67-digit and 151-digit prime numbers. The sieving of 11,290+ is underway.
8 Apr 2012, 7:13:42 UTC
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lasieve5f app released for 64-bit linux

A new lasieve5f app has been released for 64-bit linux. This app allows sieving over a larger range and thus will allow us to complete 2,1061-. If you are currently sieving using the lasievef app and use 64-bit linux, please ensure that this app is enabled in your preferences. If you are avoiding the lasievef app because of the large memory usage, please ensure that this app is disabled in your preferences.
31 Mar 2012, 17:41:12 UTC
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7,355+ factored

7,355+ has been factored into 80-digit and 126-digit prime numbers. The sieving of 2,1000+ is also complete and post-processing has begun. The sieving of 5,433+ is nearly complete, and I'm hoping to soon finish the sieving of 2,1061- with a modified siever.
30 Mar 2012, 0:49:02 UTC
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15e errors fixed!

I made a mistake setting up the 2,1000+ project that caused all workunits to immediately end with a compute error. That has now been fixed. I apologize for the inconvenience.
10 Mar 2012, 7:33:46 UTC
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2,1990L factored

2,1990L is now factored into 109-digit and 126-digit prime numbers. The sieving of 7,355+ is underway.
26 Feb 2012, 18:35:18 UTC
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2,2382M factored

2,2382M is now factored into 100-digit and 119-digit prime numbers. The sieving of 2,1990L is going well.

31 Jan 2012, 21:00:16 UTC
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10,590M factored

10,590M is now factored into 101-digit and 112-digit prime numbers. It finished on New Years Day, but the announcement was delayed by a very hectic few weeks. The sieving of 2,2382M is nearly complete, and I just queued the first workunits for 2,1990L. I also queued 40,000 more workunits for 2,1061-, which I am hoping will be sufficient.
19 Jan 2012, 23:32:34 UTC
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3,605+ factored

The project volunteers made quick work of 3,605+. It has been factored into 76-digit and 109-digit prime numbers. The sieving of 10,590M is going well.
4 Dec 2011, 5:03:32 UTC
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2,1822M factored

2,1822M has been factored into 85-digit and 131-digit prime numbers. The sieving of 3,605+ is nearly complete, and 10,590M has begun.
27 Nov 2011, 19:25:53 UTC
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10,274+ factored

10,274+ has been factored into 77-digit, 88-digit, and 90-digit prime numbers. The sieving of 2,1822M is going well. Once it is complete, we will start a run of smaller numbers that require quartic algebraic polynomials. This means that they will be a bit harder than they first appear based on size, but easier than numbers we have been doing lately.
22 Oct 2011, 5:54:47 UTC
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11,263+ factored

11,263+ has been factored into 78-digit and 174-digit prime numbers. This was a successful test of new linear algebra enhancements by Ilya Popovyan.
9 Sep 2011, 19:27:51 UTC
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Kilobit SNFS factorization completed!

2,1031- has been factored into 74-digit and 225-digit prime numbers. This is the project's first kilobit SNFS factorization and the second largest SNFS factorization to date. The 74-digit factor appears just out of reach of recent attempts using ECM on a cluster of Playstation 3's. Join the sieving of 2,1061- and help us set a new SNFS record!
9 Aug 2011, 20:22:14 UTC
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2,1814M factored

2,1814M has been factored into 98-digit and 137-digit prime numbers. The linear algebra of 2,1031- is now about 80% complete.
27 Jul 2011, 21:05:12 UTC
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7,323+ factored

7,323+ is factored. The composite cofactor was the product of 65-digit and 164-digit prime numbers. The post-processing of 2,1031- is going smoothly. The linear algebra is about 40% complete.
27 Jun 2011, 17:50:01 UTC
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7,323- factored

7,323- is factored. The composite cofactor was the product of 92-digit and 150-digit prime numbers. 2,1031- is now again in post-processing.
15 Jun 2011, 0:28:44 UTC
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2,2114M factored, cluster upgrade

2,2114M is factored. The composite cofactor was the product of 73-digit and 126-digit prime numbers. 2,1031- will soon be back to post-processing. I have successfully created a matrix for it, but am exploring reducing its size a bit. Thanks to a small grant from the university, the cluster used for the post-processing of lower difficulty numbers has been upgraded to InfiniBand communication, which halves the time required for the linear algebra. Thanks again for your contributions!
6 Jun 2011, 6:08:34 UTC
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7,341+ factored

7,341+ is factored. The composite cofactor was the product of 75-digit and 134-digit prime numbers. Thanks!
30 May 2011, 17:15:56 UTC
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6,349- and 6,374+ are factored

6,349- and 6,374+ are both factored. The composite cofactor of 6,349- was the product of 68-digit and 141-digit prime numbers, while that of 6,374+ was the product of 104-digit and 111-digit prime numbers. Thanks again for your contributions!
24 May 2011, 6:58:57 UTC
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2,979+ factored

2,979+ is factored. The composite cofactor was the product of 101-digit and 155-digit prime numbers. Filtering indicates 2,1031- requires a bit more sieving, so don't be surprised when more work units for it appear in your work queue.
27 Apr 2011, 3:51:14 UTC
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5,389- factored

5,389- is factored. The composite cofactor was the product of 79-digit and 152-digit prime numbers.
4 Apr 2011, 19:05:43 UTC
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Problem work units have been purged

A batch of bad lasievef (16e) workunits were accidentally sent out. Those have now been canceled and will be removed from your work queue automatically when your client next connects to the project. I apologize for the inconvenience.
24 Mar 2011, 7:21:30 UTC
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3,569- factored

3,569- is factored. The composite cofactor was the product of 115-digit and 116-digit prime numbers. A few more work units for 2,1031- are being released, but we're close to beginning postprocessing!
19 Mar 2011, 19:20:52 UTC
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6,377- factored

6,377- is factored. The composite cofactor was the product of 64-digit, 77-digit, and 109-digit prime numbers. The sieving of 2,1031- is nearing completion!
4 Mar 2011, 0:59:33 UTC
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2,1040+ and 2,997+ factored

2,1040+ and 2,997+ are factored. The composite cofactor of 2,1040+ was the product of 82-digit and 103-digit prime numbers, and that of 2,997+ was the product of 103-digit and 184-digit prime numbers. 2,997+ is the third largest SNFS factorization completed to date. The sieving of 2,1031- continues to go well!
21 Feb 2011, 8:58:46 UTC
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6,347+ and 2,1099+ factored

6,347+ and 2,1099+ are factored. The composite cofactor of 6,347+ was the product of 95-digit and 101-digit prime numbers, and that of 2,1099+ was the product of 71-digit and 112-digit prime numbers. The sieving of 2,1031- continues to go well!
30 Jan 2011, 23:07:55 UTC
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5,386+ factored

5,386+ is factored. The composite cofactor was the product of 76-digit and 147-digit prime numbers. The sieving of 2,1031- is going well!
9 Jan 2011, 5:56:38 UTC
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5,895M factored

5,895M is factored. The composite cofactor was the product of 80-digit and 101-digit prime numbers. The sieving of 2,997+ is nearing completion, and we will soon begin sieving NFS@Home's first kilobit SNFS, 2,1031-.
21 Dec 2010, 22:11:28 UTC
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Overnight outage

I apologize for the overnight outage. A power line was struck by lightning Sunday night which caused the campus to lose its 66kV power supply. Everything should now be back to normal.
6 Dec 2010, 19:32:26 UTC
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6,379+ factored, and another third place record

6,379+ is factored. The composite cofactor was the product of 62-digit and 208-digit prime numbers. This is a new Cunningham project third-place record for SNFS difficulty!
1 Dec 2010, 20:46:48 UTC
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2,1195+ factored

2,1195+ is factored. The composite cofactor was the product of 70-digit and 110-digit prime numbers. 6,379+ will soon finish as well. 5,895M is now in postprocessing, and the sieving of 5,386+ and 2,997+ is going well.
30 Nov 2010, 1:32:59 UTC
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2,2086L factored

2,2086L is factored. The composite cofactor was the product of 55-digit and 149-digit prime numbers. The sieving of 5,895M and 2,997+ is going well.
19 Nov 2010, 1:49:24 UTC
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6,346+ and 3,607- are factored

Both 6,346+ and 3,607- finished yesterday. The composite cofactor of 6,346+ was the product of 95-digit and 147-digit prime numbers, and that of 3,607- was the product of 85-digit, 96-digit, and 110-digit prime numbers. 3,607- sets a new second-place record for the largest Cunningham number factored by size of the number factored. The sieving of 2,2086L and 6,379+ is going well.
2 Nov 2010, 20:46:54 UTC
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5,409- factored

5,409- is factored. The composite cofactor was the product of 96-digit and 186-digit prime numbers. The sieving of 6,346+ and 3,607- is going well.
4 Oct 2010, 19:17:41 UTC
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7,338+ factored

7,338+ is factored. The composite cofactor was the product of 80-digit and 156-digit prime numbers. The postprocessing of 5,409- is on track, and the sieving of 6,346+ and 3,607- is going well.
28 Sep 2010, 1:37:08 UTC
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3,563+ factored, NSF Teragrid grant

3,563+ is factored. The composite cofactor was the product of 117-digit and 123-digit prime numbers. Sieving of 6,346+ and 3,607- has begun. In other news, we have received a National Science Foundation Teragrid grant of 300000 CPU-hours to further explore parallelization of the linear algebra step in postprocessing. The linear algebra of 5,409- will be run on Teragrid supercomputers beginning next week.
17 Sep 2010, 21:33:54 UTC
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Mac OS X Intel app released

A new 32-bit Intel Mac OS X application has been released. This application should run on both 32-bit and 64-bit Intel-based Macs. A colleague kindly provided an account on his iMac, and after much frustration the compiler finally generated a binary that passes all of my local tests. However, I have no other Macs to test it on, so please give it a try and report any problems that you encounter.
4 Sep 2010, 22:49:35 UTC
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3,563- factored

The second number largely sieved during the NFS Mid-August Push, 3,563-, is now factored. The composite cofactor was the product of 83-digit and 117-digit prime numbers. Sieving of 5,409- is progressing steadily, albeit slowly.
22 Aug 2010, 16:45:09 UTC
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12,254+ factored

The NFS Mid-August Push was highly successful, and as a result 12,254+ is now factored. The composite cofactor was the product of 97-digit and 134-digit prime numbers. We are now sieving 5,409-, the largest factorization ever attempted with open source software. Any help you can provide will be greatly appreciated!
18 Aug 2010, 21:49:36 UTC
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5,448+ factored, team challenge begins this weekend!

5,448+ is factored. The composite cofactor was the product of 65-digit and 141-digit prime numbers. The NFS team challenge at BOINCstats starts this weekend. Be sure your team is signed up!
6 Aug 2010, 8:11:37 UTC
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2,904+ factored, sievers needed!

2,904+ is factored. This was #4 on the Cunningham Project's Ten Most Wanted list. The composite cofactor was the product of 81-digit and 130-digit prime numbers. We still need lots of sievers! Let's push 12,254+ through as quickly as possible and start the record-sized numbers!
31 Jul 2010, 19:03:50 UTC
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Larger numbers & credit adjustment

Thanks to recent advances in the msieve postprocessing code, a significant barrier limiting the size of numbers that we can factor has been removed. Therefore, over the next few months, we will be factoring progressively larger numbers using the lasievef application. To reflect the increased importance of these larger work units, their credit has been adjusted.

If your computer has at least 1.25 GB of memory per core and you are not running other memory-hungry applications in the background, please try disabling the lasievee application in your NFS@Home preferences. If your computer can successfully run the lasievef application, you will contribute to the largest NFS factorizations completed to date using open source software and will earn more credits per day. In the case of a quad-core computer with 4 GB of memory, you will earn more credit per day running three instances of lasievef and leaving one core idle than running four instances of lasievee.

Do not worry if your computer does not have sufficient memory for the lasievef application or other background processes prevent you from using it. Work for lasievee will continue to be available over the long term.
27 Jul 2010, 20:26:22 UTC
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2,1036+ factored

2,1036+ is factored. The composite cofactor was the product of 71-digit and 142-digit prime numbers.
27 Jul 2010, 19:52:49 UTC
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7,364+ factored

7,364+ is factored. The composite cofactor was the product of 73-digit and 152-digit prime numbers. Let's keep going!
17 Jul 2010, 0:42:51 UTC
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11,287- factored

11,287- is factored. The composite cofactor was the product of 68-digit and 118-digit prime numbers. Thanks to the recent introduction of parallel linear algebra into msieve, the postprocessing now takes less time than sieving. We need more sievers! Let's keep going!
2 Jul 2010, 18:18:55 UTC
· Comment

11,287+ factored

11,287+ is factored. It was a rare three-way split. The composite cofactor was the product of 64-digit, 71-digit, and 100-digit prime numbers. 11,287- will finish shortly. Let's keep going!
1 Jul 2010, 0:00:47 UTC
· Comment

10,387- factored

10,387- is factored. The composite cofactor was the product of 97-digit and 125-digit prime numbers. Thanks to exciting improvements in the parallelization of the msieve postprocessing code, two more should finish soon. Let's keep going!
29 Jun 2010, 8:04:52 UTC
· Comment

2,1798L factored

2,1798L is factored. The composite cofactor was the product of 62-digit and 146-digit prime numbers. Another should finish soon. Let's keep going!
27 Jun 2010, 16:21:12 UTC
· Comment

10,387+ factored

10,387+ is factored. The composite cofactor was the product of 80-digit and 143-digit prime numbers. Another should finish in about a week. Let's keep going!
21 Jun 2010, 6:19:30 UTC
· Comment

10,384+ factored

10,384+ is factored. The composite cofactor was the product of 81-digit and 131-digit prime numbers. Another should finish (again) in a few days. Let's keep going!
18 Jun 2010, 5:42:22 UTC
· Comment

10,272+ factored

10,272+ is factored. The composite cofactor was the product of 98-digit and 114-digit prime numbers. Another should finish in a few days. Let's keep going!
15 Jun 2010, 20:16:32 UTC
· Comment

6,385- factored

6,385- is factored. The composite cofactor was the product of 84-digit and 103-digit prime numbers. Another should finish in a about a week. Let's keep going!
8 Jun 2010, 6:59:16 UTC
· Comment

3,562+ factored

3,562+ is factored. The composite cofactor was the product of 86-digit and 170-digit prime numbers. Another should finish in a few days. Let's keep going!
4 Jun 2010, 6:50:44 UTC
· Comment

5,427- factored

5,427- is factored. The composite cofactor was the product of 70-digit and 135-digit prime numbers. Let's keep going!
30 May 2010, 5:07:08 UTC
· Comment

Our 50th factorization!

5,427+ is factored. The composite cofactor was the product of 54-digit and 145-digit prime numbers. This is the project's 50th completed factorization! Let's continue working toward another 50!
24 May 2010, 4:40:01 UTC
· Comment

2,1774M factored

2,1774M is factored. The composite cofactor was the product of 103-digit and 113-digit prime numbers. I've added a report of our daily progress to the server status page, and it's slowly creeping upward. Thank you for all of your contributions!
18 May 2010, 17:28:02 UTC
· Comment

3,583+ factored

3,583+ is factored. The composite cofactor was the product of 76-digit and 149-digit prime numbers. Our daily production has dropped to half of its peak value. Let's get it back up!
5 May 2010, 8:33:28 UTC
· Comment

2,1766L factored

2,1766L is factored. The composite cofactor was the product of 122-digit and 137-digit prime numbers. That's our largest penultimate factor to date. Let's keep going!
4 May 2010, 1:16:01 UTC
· Comment

2,1762M factored

2,1762M is factored. The composite cofactor was the product of 88-digit and 146-digit prime numbers. Let's keep going!
25 Apr 2010, 6:42:36 UTC
· Comment

5,383- factored

5,383- is factored. The composite cofactor was the product of 88-digit and 96-digit prime numbers. Let's keep sieving!
17 Apr 2010, 21:48:39 UTC
· Comment

2,1762L factored

2,1762L is factored. The composite cofactor was the product of 83-digit and 166-digit prime numbers. The next one should finish within the next week or so. Let's keep going!
16 Apr 2010, 6:45:20 UTC
· Comment

2,899- factored

2,899- is factored. The composite cofactor was the product of 91-digit and 95-digit prime numbers. The next one should finish shortly. Let's keep going!
15 Apr 2010, 0:18:32 UTC
· Comment

10,271- factored

10,271- is factored. The composite cofactor was the product of 94-digit and 121-digit prime numbers. Two more should finish in the next few days, so let's keep going!
11 Apr 2010, 4:17:38 UTC
· Comment

11,257- factored

11,257- is factored. The composite cofactor was the product of 61-digit, 71-digit, and 94-digit prime numbers. On to the next one!
6 Apr 2010, 18:36:17 UTC
· Comment

2,1754M factored

2,1754M is factored. The composite cofactor was the product of 79-digit and 102-digit prime numbers. 11,257- is running a bit behind, but should finish soon. Let's keep going!
2 Apr 2010, 6:52:43 UTC
· Comment

Scheduled downtime this weekend

The NFS@Home project will be down from Friday evening, March 26, until Monday morning, March 29. There is major electrical work being performed over the weekend, so the building power will be out. I apologize for the inconvenience.
24 Mar 2010, 23:13:43 UTC
· Comment

2,1718M factored

2,1718M is factored. The composite cofactor was the product of 92-digit and 108-digit prime numbers. We have to wait a few days for the next one. Let's keep going!
21 Mar 2010, 6:36:01 UTC
· Comment

11,254+ factored

11,254+ is factored. The composite cofactor was the product of 68-digit and 160-digit prime numbers. The next number should finish very soon.
20 Mar 2010, 19:52:26 UTC
· Comment

2,1718L factored

2,1718L is factored. The composite cofactor was the product of 96-digit and 137-digit prime numbers. Let's keep going!
14 Mar 2010, 4:02:08 UTC
· Comment

7,314+ factored

7,314+ is factored. The composite cofactor was the product of 66-digit and 150-digit prime numbers. 2,1718L should finish soon. Let's keep going!
14 Mar 2010, 1:04:44 UTC
· Comment

EM43 factored

EM43 is factored. The composite cofactor was the product of 68-digit and 112-digit prime numbers. This factorization allows progress on the sequence to continue. Two additional numbers should finish in the next few days. Let's keep going!
9 Mar 2010, 19:38:16 UTC
· Comment

2,887+ factored, 2,899- delayed

2,887+ is factored. The composite cofactor was the product of 83-digit and 124-digit prime numbers. In other news, disaster struck the linear algebra of 2,899-. The process was killed, and the checkpoint file was corrupted. The linear algebra step will need to be restarted from scratch. Let's keep going!
5 Mar 2010, 21:39:37 UTC
· Comment

Project is back online

An extended power outage overnight exhausted the UPS and shut the server down. Everything is now back online and humming along. Again, please let me know if you find something that is amiss.
27 Feb 2010, 18:08:01 UTC
· Comment

Server maintenance is complete

The server maintenance is complete. Everything is back up and (hopefully) running smoothly. Please let me know if you find something that is amiss.
27 Feb 2010, 0:46:52 UTC
· Comment

Short downtime planned for Friday

The server will be down briefly on Friday afternoon (Pacific time) for routine maintenance. It should last less than an hour (with luck) so most users will not be affected.
24 Feb 2010, 19:34:31 UTC
· Comment

2,1714L factored

2,1714L is factored. The composite cofactor was the product of 78-digit and 114-digit prime numbers. The sieving of 2,1718M is going well. Let's keep going!
15 Feb 2010, 18:50:16 UTC
· Comment

2,887- factored

2,887- is factored. The composite cofactor was the product of 73-digit and 137-digit prime numbers. The sieving of 2,1718L is going well. Let's keep going!
11 Feb 2010, 19:37:33 UTC
· Comment

5,377+ factored

5,377+ is factored. The composite cofactor was the product of 79-digit and 93-digit prime numbers. I have released a little more sieving for 5,383- to reduce the size of the matrix produced. Let's keep going!
5 Feb 2010, 20:06:38 UTC
· Comment

6,338+ factored

6,338+ is factored. The composite cofactor was the product of 82-digit and 83-digit prime numbers. The sieving of 10,271- and 11,257- is going well. Let's keep going!
4 Feb 2010, 22:26:00 UTC
· Comment

10,268+ factored

10,268+ is factored. The composite cofactor was the product of 63-digit and 181-digit prime numbers. 11,257- has begun sieving. It's been a productive January. Let's make February a good month too!
1 Feb 2010, 4:27:47 UTC
· Comment

2,1714M factored

2,1714M is factored. The composite cofactor was the product of 64-digit and 105-digit prime numbers. 11,254+ is now in postprocessing, and 11,257- will soon start sieving. Let's keeping going!
31 Jan 2010, 0:08:23 UTC
· Comment

7,311- factored

7,311- is factored. The composite cofactor was the product of 66-digit and 160-digit prime numbers. Let's keep going!
28 Jan 2010, 21:20:22 UTC
· Comment

3,548+ factored

3,548+ is factored. The composite cofactor was the product of 58-digit and 139-digit prime numbers. 10,271- and 5,383- have begun sieving.
24 Jan 2010, 18:58:36 UTC
· Comment

5,373+ factored

5,373+ is factored. The composite cofactor was the product of 101-digit and 114-digit prime numbers. EM43 is now in postprocessing, 2,1714L will soon begin postprocessing, and 2,1714M and 6,338+ are sieving.
19 Jan 2010, 1:49:53 UTC
· Comment

2,941- factored

2,941- is factored. The composite cofactor was the product of 69-digit and 211-digit prime numbers. This near-record factorization was spearheaded by Tom Womack and completed in collaboration with the MersenneForum.org participants, NFS@Home, and Bruce Dodson.
13 Jan 2010, 7:32:24 UTC
· Comment

6,332+ factored

6,332+ is factored. The composite cofactor was the product of 69-digit and 108-digit prime numbers. EM43 has now started sieving.
8 Jan 2010, 18:56:43 UTC
· Comment

RSA-768 factored (but not by us)

A new record GNFS factorization has been completed. The 232-digit number RSA-768 has been split into two 116-digit primes. Compare this to our soon-to-start (and much easier) factorization of the 180-digit EM43. NFS@Home earns a brief mention in the paper.

8 Jan 2010, 1:35:20 UTC
· Comment

6,331+ factored

6,331+ is factored. The composite cofactor was the product of 68-digit and 160-digit prime numbers. 7,314+ and 2,887+ are now in postprocessing. The next factorization will finish shortly.
7 Jan 2010, 19:24:42 UTC
· Comment

6,323+ factored

One last number for 2009! 6,323+ is factored. The composite cofactor was the product of 106-digit and 115-digit prime numbers. Have a safe and happy 2010!
1 Jan 2010, 4:18:07 UTC
· Comment

10,269- factored

10,269- is factored. The composite cofactor was the product of 91-digit and 143-digit prime numbers. The sieving of 7,311- is going well, and 3,548+ will soon be in postprocessing. Let's keep sieving!
21 Dec 2009, 6:15:00 UTC
· Comment

5,361+ factored, 6,323+ delayed

5,361+ is factored. The composite cofactor was the product of 62-digit and 159-digit prime numbers. The factorization of 6,323+ has been delayed. Block Lanczos failed to find any non-trivial solutions of the matrix. While fortunately rare, this does occasionally happen. A new matrix has been generated, and another linear algebra run has begun. The sieving of 7,311- will soon begin, and 5,373+ is now in postprocessing. The next factorization will finish in a few days.
16 Dec 2009, 22:30:00 UTC
· Comment

DC Vault

In other news, today the project was added to the DC Vault. I've queued up lots of work, so let the battle over team position commence!
12 Dec 2009, 20:50:00 UTC
· Comment

2,1678M factored

2,1678M is factored. The composite cofactor was the product of 64-digit and 133-digit prime numbers. The sieving of 3,548+ has begun, and 6,332+ is now in postprocessing. The next factorization will finish shortly.
12 Dec 2009, 20:00:00 UTC
· Comment

2,1678L factored

2,1678L is factored. The composite cofactor was the product of 98-digit and 99-digit prime numbers. The sieving of 5,373+ and 10,268+ is going well, and 6,332+ will soon be in postprocessing. The next factorization will finish in a few days.
9 Dec 2009, 20:15:00 UTC
· Comment

2,1726L factored

2,1726L is factored. The composite cofactor was the product of 108-digit and 109-digit prime numbers. 5,373+ has started sieving. The next factorization will finish in a few days.
7 Dec 2009, 19:15:00 UTC
· Comment

6,334+ and 5,361- factored

6,334+ and 5,361- are factored. The composite cofactor of 6,334+ was the product of 80-digit and 101-digit prime numbers, and that of 5,361- was the product of 71-digit and 118-digit prime numbers. 5,373+ will soon start sieving, and 6,331+ is in postprocessing. Look for the next factorization tomorrow.
6 Dec 2009, 22:15:00 UTC
· Comment

12,239- factored

12,239- is factored. The composite cofactor was the product of 101-digit and 102-digit prime numbers. 5,361+ is now sieving, and 2,1678M is in postprocessing. The next few factorizations will finish in early December.
25 Nov 2009, 20:00:00 UTC
· Comment

2,863- factored

2,863- is factored. The composite cofactor was the product of 97-digit and 137-digit prime numbers. 12,239- should complete in a few days.
22 Nov 2009, 19:30:00 UTC
· Comment

2,859+ factored, minor hardware issue resolved

2,859+ is factored. The composite cofactor was the product of 83-digit and 151-digit prime numbers. The sieving of 6,323+ has started, and 2,1678L is in postprocessing. The RAID array is successfully rebuilt, and all is back to normal.
21 Nov 2009, 8:15:00 UTC
· Comment

7,307+ factored, minor hardware issue

7,307+ is factored. The composite cofactor was the product of 89-digit and 137-digit prime numbers. The sieving of 2,1678M has started, and 2,1678L will soon be in postprocessing. Also, a drive in the server failed today, but fortunately RAID did its job. I swapped the drive out, and the array is rebuilding now. Another number down, lots more to go!
19 Nov 2009, 23:00:00 UTC
· Comment

2,856+ factored

2,856+ is factored. The composite cofactor was the product of 69-digit and 155-digit prime numbers. The sieving of 2,1678L has started, and 6,334+ is in postprocessing. Let's keep sieving!
15 Nov 2009, 7:45:00 UTC
· Comment

2,853+ factored

2,853+ is factored. The composite cofactor was the product of 101-digit and 121-digit prime numbers. The sieving of 5,361- has started, and 2,1726L is in postprocessing. Let's keep going!
8 Nov 2009, 0:15:00 UTC
· Comment

3,538+ factored

3,538+ is factored. The composite cofactor was the product of 77-digit and 101-digit prime numbers. We should have the factors of 2,853+ in a few days. Let's keep going!
5 Nov 2009, 0:15:00 UTC
· Comment

2,851+ factored

2,851+ is factored. The composite cofactor was the product of 93-digit and 121-digit prime numbers. 7,307+ is now in postprocessing, and the sieving of 10,269- and 6,334+ is going well.
31 Oct 2009, 8:50:00 UTC
· Comment

Status update

First of all, I apologize for the brief periods of downtime over the past few days. The project has grown larger than I originally anticipated, so I've been optimizing the back-end configuration. The good news is that now the project has plenty of room to grow. 2,859+ and 12,239- are now in postprocessing, and the sieving of 7,307+ is finishing and 2,1726L is going well. After a few minor bumps, the sieving of 2,941- with the 16e siever is also going well. And finally, the factors of 2,851+ should arrive Saturday.
28 Oct 2009, 3:30:00 UTC
· Comment

2,941-

One of the goals of the project is to collaborate with other groups on record-size factorizations. As such, we are assisting mersenneforum.org with their factorization of 2,941-. This is the second largest SNFS factorization to date (the largest is 2,1039-), and the largest using open source software. These workunits use the lasievef application. As a reminder, if you do not wish to run these workunits, you may deselect the lasievef application in your NFS@Home preferences.
23 Oct 2009, 0:00:00 UTC
· Comment

16e Lattice Sieve

Shortly I will begin releasing work for the 16e lattice sieve, lasievef. These workunits will take a bit longer to process and will require up to 1 GB of memory. The BOINC client will process them only if your computer has sufficient memory. You can choose not to process these work units by deselecting the lasievef application in NFS@Home preferences in your account. Workunits for the current lasievee application will continue to be available.
22 Oct 2009, 19:30:00 UTC
· Comment

12,233- factored, 6,334+ partially factored

12,233- is factored. The composite cofactor was the product of 64-digit and 151-digit prime numbers. Also today, ECM pretesting found a factor of 6,334+. Unfortunately, the cofactor remains composite so the number still requires sieving. 2,863- is in postprocessing, 3,538+ will soon start postprocessing, the sieving of 2,859+ is slowly finishing, and the sieving workunits for 12,239- have started going out.
20 Oct 2009, 18:45:00 UTC
· Comment

12,232+ factored

12,232+ is factored. The composite cofactor was the product of 61-digit and 120-digit prime numbers. 2,863- will soon start postprocessing, and the sieving of 3,538+ is going well.
16 Oct 2009, 2:30:00 UTC
· Comment

Move to server-determined credits

Due to a large number of requests, the number of credits granted is now determined by the server by monitoring the number of credits claimed by a reference computer. Although there is a small variation in the amount of work required for each work unit, this will average out over time.
15 Oct 2009, 0:35:00 UTC
· Comment

2,853+ and 2,856+ in postprocessing

Both 2,853+ and 2,856+ are now in postprocessing, and both should finish in the second week of November. Thanks to a major push by a few members of Ars Technica in addition to the numerous other contributors, these went quite quickly. Sieving for 2,863- is going well, and we will soon start the sieving of 3,538+.
11 Oct 2009, 20:25:00 UTC
· Comment

6,316+ factored

6,316+ is factored. The composite cofactor was the product of 101-digit and 110-digit prime numbers. I have released a bit more work for 2,853+ to reduce the size of the matrix. Sieving of 2,856+ is going well.
5 Oct 2009, 20:30:00 UTC
· Comment

5,353+ factored

5,353+ is factored. The composite cofactor was the product of 94-digit and 137-digit prime numbers.
2 Oct 2009, 23:30:00 UTC
· Comment

6,317+ factored

6,317+ is factored. The composite cofactor was the product of 68-digit and 158-digit prime numbers.
2 Oct 2009, 5:30:00 UTC
· Comment

New server, status of numbers

I've been quiet the past week, but there's a lot going on behind the scenes. First, thanks to a generous donation the project has been moved to its third and hopefully final server. The last one was working fine, but it now has proper redundant disks and power supplies. Of course, I'll still be doing regular backups. 12,233- is now in post-processing and should take about 19 days or so. The sieving of 2,851+ is nearly done, so the post-processing will start in a day or two. The sieving of 2,853+ will take another few days to finish, at which point we'll start 2,856+. Finally, we have a flurry of results coming, starting with 6,317+ which should finish in a few hours.
1 Oct 2009, 20:15:00 UTC
· Comment

12,232+ in postprocessing, next two projects

I just started postprocessing for 12,232+. I don't yet have the matrix size, but I expect it to be around 11 million by 11 million elements and to take about 3 weeks or so to solve. The sieving of 12,233- is nearing completion. The next two projects 2,851+ and 2,853+ are nearly the same difficulty, so we will investigate the effect that increasing the large primes from 30-bits to 31-bits has on the size of the final matrix.
24 Sep 2009, 4:45:00 UTC
· Comment

6,317+ in postprocessing, next project

6,317+ is now in postprocessing. With additional sieving, a somewhat smaller matrix with 9.2 million by 9.2 million elements was created and will take about 11 days to solve. The sieving of 12,232+ is nearing completion, and work units for the next project, the Cunningham number 12,233-, are starting to go out. I've created a page to track the status of each number.
19 Sep 2009, 20:45:00 UTC
· Comment

6,316+ in postprocessing, next project

6,316+ is now in postprocessing. A matrix with 10.9 million by 10.9 million elements was created and will take about 19 days to solve. 5,353+ is on track and should take about 16 more days to solve. The sieving of 6,317+ is nearing completion, and work units for the next project, the Cunningham number 12,232+, are starting to go out.
17 Sep 2009, 5:45:00 UTC
· Comment

Connection issues resolved (hopefully)

I apologize for the extended outage today. I moved the project over to a beefier server, so hopefully the connection issues are resolved. I'll keep a close eye on it going forward. Thanks again for your patience!
16 Sep 2009, 2:45:00 UTC
· Comment

Connection issues

The project is still running well thanks to BOINC's buffering mechanism, but the site is experiencing intermittent connection issues. Please be patient as we iron these out. Thanks!
15 Sep 2009, 17:30:00 UTC
· Comment

5,353+ in postprocessing, next project

5,353+ is now in postprocessing. A matrix with 11 million by 11 million elements was created and will take about 19 days to solve. The sieving of 6,316+ is nearing completion, and work units for the next project, the closely related Cunningham number 6,317+, are starting to go out.
14 Sep 2009, 5:45:00 UTC
· Comment

2,2214L result, 5,353+ status, next project

2,2214L is factored! The composite cofactor was the product of 87-digit and 104-digit primes. The sieving of 5,353+ is nearly complete. There are about 3000 work units still out, and I anticipate that they will trickle in over the next few days. The next project is 6316+1, which is also a Cunningham Project wanted number. Let's keep going!
11 Sep 2009, 20:45:00 UTC
· Comment

BOINCstats!

We are now included in BOINCstats! The linear algebra for 2,2214L is nearly 50% complete and is on track to finish in another day. The sieving of 5,353+ is still going well, so spread the word and let's move up the list!
10 Sep 2009, 20:00:00 UTC
· Comment

2,2214L post-processing has started

There remain a few 2,2214L work units out there, but there was sufficient sieving that they are not necessary for the final calculations. Although they will not be used, credit will be given for completing them. Filtering of the relations produced a matrix of 4.49 million x 4.49 million elements. This matrix should take about two days to solve, so we should have our first factors then. We have completed about half of the sieving of 5,353+, so keep crunching!
9 Sep 2009, 19:30:00 UTC
· Comment

2,2214L is almost done

2,2214L is nearly done. As of now, there are 580 work units still in progress. The results already submitted are sufficient to create a matrix of 4.7 million x 4.7 million elements. The relations in the additional work units will reduce the size of this matrix, making it easier to solve. The sieving of 5,353+ is going well, so keep crunching!
8 Sep 2009, 2:00:00 UTC
· Comment

5,353+ added

2,2214L is going along well. As of now, we have completed about 20% of the required sieving. For the next project, we will sieve the number 5353+1. The sieving of this number will be about 9 times harder than the sieving of 2,2214L. Let's keep the computers busy!
6 Sep 2009, 5:30:00 UTC
· Comment

Public Beta

As a public test of this platform, we will sieve 2,2214L. Try it out and report any problems.
5 Sep 2009, 3:00:00 UTC
· Comment

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