Posts by Gigacruncher [TSBTs Pirate]
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| 21) Message boards : NFS Discussion : NFS@Home Project Goals
Message 2360 Posted 15 Jan 2023 by  Gigacruncher [TSBTs Pirate]
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State-of-the-art factorizations Siever to use is: lasieve5f (16e credit, 16e Lattice Sieve V5 ),130 credits per wu. Long time goals: "Gang of 31", now "Gang of 21". The Cunningham project may be the longest ongoing computational project in history. See https://homes.cerias.purdue.edu/~ssw/cun/. As of this update (9th January 2025) there are 21 numbers as yet unfactored from the 1987 published version of the book. These are all numbers of the form 2^n+1 for n < 1200 and 2^(2n+1) +/- 2^(n+1) + 1 for n < 600. During the last number of years, big push has and is being made to finish all Mersenne numbers (2^n-1) for n < 1200, but more power is needed. It would be nice to finish this last small set of composites (21 now). They were added to the tables in the early 1960's by John Selfridge and D.H. Lehmer, so have been waiting for over 60 years to get done. Attempts to factor these numbers have been made since the time of Fermat, so they have strong historical interest. Below is currently the work load table being run that uses the Number Field Sieve to factor these numbers with support from Yoyo on the ECM front. This project pushes the state of the art in factoring algorithms and every little help is appreciated to finish these last 21 composites. 2_2222L C228 SNFS 334 Done by yoyo@Home (Jan. 8, 2023) 2_2278M C234 SNFS 343 Done by yoyo@Home (May. 17, 2023) 2_1151+ C236 SNFS 347 (yoyo@Home doing ECM) 2_2206L C243 SNFS 332 Done by NFS@Home (Mar. 10, 2023) 2_1136+ C247 SNFS 342 Done by Wagstaff ECMNET (Sep. 30, 2023) 2_1139+ C248 SNFS 323 (yoyo@Home doing ECM) 2_2246L C253 SNFS 338 Done yoyo@Home (Oct. 25, 2023 p78.c176) (charybdis is tackling the c176 done Oct 30, 2023) 2_2266L C255 SNFS 341 (yoyo@Home doing ECM) 2_1108+ C271 SNFS 334 Done by NFS@Home (Apr. 10, 2023) 2_2354M C271 SNFS 354 (yoyo@Home doing ECM) 2_2306L C287 SNFS 347 (yoyo@Home doing ECM) 2_1097+ C288 SNFS 331 Done by NFS@Home (Dec. 19, 2022) 2_2222M C289 SNFS 334 Done by NFS@Home (May 2, 2023) 2_2342M C291 SNFS 353 (yoyo@Home doing ECM) 2_2302L C293 SNFS 347 (yoyo@Home doing ECM) 2_2318M C296 SNFS 349 (yoyo@Home doing ECM) 2_1163+ C297 SNFS 350 (yoyo@Home doing ECM) 2_2194M C301 SNFS 331 Done by NFS@Home (Feb. 4, 2023) 2_2194L C304 SNFS 331 Done by NFS@Home (Jan. 11, 2023) 2_2378L C305 SNFS 358 (yoyo@Home doing ECM) 2_1153+ C306 SNFS 347 (yoyo@Home doing ECM) 2_2374L C309 SNFS 358 (yoyo@Home doing ECM) 2_1124+ C311 SNFS 338 (NFS@Home Sieving in Progress) 2_2354L C314 SNFS 354 (yoyo@Home doing ECM) 2_1147+ C317 SNFS 345 (yoyo@Home doing ECM) 2_1159+ C318 SNFS 349 (yoyo@Home doing ECM) 2_1168+ C326 SNFS 352 (yoyo@Home doing ECM) 2_2398M C326 SNFS 361 (yoyo@Home doing ECM) 2_1129+ C330 SNFS 340 (yoyo@Home doing ECM) 2_1187+ C334 SNFS 358 (yoyo@Home doing ECM) 2_1123+ C338 SNFS 338 Done by NFS@Home (Feb. 6, 2025) Some of the above integers have been enqueued at https://www.rechenkraft.net/yoyo/y_status_ecm.php#tabs-2, tab Cunningham. Note: the above content has been adapted from Bob Silverman guidelines (thank you!). |
| 22) Message boards : NFS Discussion : NFS@Home Project Goals
Message 2359 Posted 15 Jan 2023 by Gigacruncher [TSBTs Pirate]
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NFS@Home has a partnership with yoyo@Home (https://www.rechenkraft.net/yoyo/) where some of the integers are ECM'ed to its optimal before being fed onto the NFS@Home sievers. This happens when a factor is not found. yoyo@Home progress, per project, can be follow up at the following address: https://www.rechenkraft.net/yoyo/y_status_ecm.php We would like to thank all yoyo@Home users too for their work, keep the factors coming! |
| 23) Message boards : NFS Discussion : NFS@Home Project Goals
Message 2358 Posted 14 Jan 2023 by Gigacruncher [TSBTs Pirate]
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lasievef_small work list: Stats Page: https://escatter11.fullerton.edu/nfs/crunching_fs.php 16e_small - GNFS 9-2,323 GNFS 199 AS 19560:i590 GNFS 203 11+9,649L GNFS 201 AS 11040:i10244 GNFS 201 16e_small - SNFS 2,2634L SNFS 264(quartic) 2,2658M SNFS 267(quartic) 7,395- SNFS 268(quartic) 7,395+ SNFS 268(quartic) 4129^79- SNFS 285 4219^79- SNFS 286 W967 SNFS 295 |
| 24) Message boards : Questions/Problems/Bugs : Server down?
Message 2326 Posted 21 Aug 2022 by Gigacruncher [TSBTs Pirate]
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Under "Computing preferences", set Memory to When computer is in use, use at most 99 % When computer is not in use, use at most 99 % |
| 25) Message boards : Questions/Problems/Bugs : No work, server down, applications
Message 2324 Posted 21 Aug 2022 by Gigacruncher [TSBTs Pirate]
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Hi all, Thank you so much for your CPU cycles donation, it is much appreciated. Back in 2009 when the project initiated only three applications were available: lasieved (14e Lattice Sieve), lasievee (15e Lattice Sieve) and lasieve5f (16e Lattice Sieve V5). Nowadays we have 2 more, the ones mentioned as smaller numbers. If for some reason you are not getting any more work, most likely due to the fact that some of the server queues are empty, try to select at least those two new applications under your NFS@Home Preferences, like this: Run only the selected applications "lasieved - very small numbers, uses less than 0.5 GB memory, work may be infrequently available: yes lasievee_small - small numbers, uses up to 0.8 GB memory: yee lasievee - medium numbers, uses up to 1 GB memory: yes lasievef_small - large numbers, uses up to 1 GB memory: yes lasieve5f - huge numbers, uses up to 1.25 GB memory: no" By doing this it will definitely get your cores busy with Wu's fitting lower memory systems. Be aware that lasieve5f (16e V5) will require more than 1.2GB/thread. |
| 26) Message boards : Questions/Problems/Bugs : Server down?
Message 2323 Posted 21 Aug 2022 by Gigacruncher [TSBTs Pirate]
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You're not getting any work because the applications you set to run have the queue empty. I recommend Going to "Preferences for this project" and select to get "lasievef_small" tasks too. |
| 27) Message boards : Questions/Problems/Bugs : Can the currently progress shown in pages?
Message 2300 Posted 15 May 2022 by Gigacruncher [TSBTs Pirate]
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2,2622L was done under the lasievef_small. |
| 28) Message boards : NFS Discussion : 3,667- is P74 * P202 Question
Message 2142 Posted 24 Mar 2021 by Gigacruncher [TSBTs Pirate]
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Hi there. You are confused but thank you for your questions. The P stands for prime factor and the number stands for number of digits. The P74 and P202 are unique and are two unknowns. For this case they are represented as below. If you see on the status page another P74 it is not the same as this one. Notation thing and to simplify the results page although you have the link to pastebin for the all post-processing phase. Sat Mar 20 02:17:11 2021 p74 factor: 25359506465081394537400918368811516993503730623239065990152596258171619851 Sat Mar 20 02:17:11 2021 p202 factor: 1230272830905372645155936347582471802810001959890217331006615213107201195904714920966951311311387729777205064177180055078095657461958973281700356722080397000095160208423082302916300621936315289528078031 3,667- means (3^667 - 1) If you have time read this thread: https://escatter11.fullerton.edu/nfs/forum_thread.php?id=549 Bear in mind we are only doing the "2. Sieving for Relations" stage on BOINC, the " 3. Combine Relations" is done on a cluster (we have a grant) and "1. Polynomial Selection" is done externally or by direct known polynomials. More about the project here: https://homes.cerias.purdue.edu/~ssw/cun/ To be honest we need even more power than currently is deployed here but slowly we will progress on the Cunningham project...lol |
| 29) Message boards : Questions/Problems/Bugs : Are there really that many hosts here ?
Message 2093 Posted 16 Aug 2020 by Gigacruncher [TSBTs Pirate]
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They were when Syracuse university were running the project. What do you need from us so I can get in touch with Greg? |
| 30) Message boards : Questions/Problems/Bugs : Stats stuck?
Message 2088 Posted 4 Aug 2020 by Gigacruncher [TSBTs Pirate]
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Sorted by admin. |
| 31) Message boards : Questions/Problems/Bugs : Upload Pending: Project Backoff
Message 2083 Posted 19 Apr 2020 by Gigacruncher [TSBTs Pirate]
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Project is working fine. You haven’t downloaded any wus on either of your computers therefore I cannot understand your message. One computer last connected 1st April, the other on the 16th March. |
| 32) Message boards : Questions/Problems/Bugs : Multithreading
Message 2043 Posted 30 Jun 2019 by Gigacruncher [TSBTs Pirate]
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Not yet. |
| 33) Message boards : Questions/Problems/Bugs : work units in gridcoin
Message 2029 Posted 19 May 2019 by Gigacruncher [TSBTs Pirate]
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Go here: https://escatter11.fullerton.edu/nfs/prefs.php?subset=project And set to: lasieved - app for RSALS subproject, uses less than 0.5 GB memory: no lasievee - work nearly always available, uses up to 0.5 GB memory: no lasievef - used for huge factorizations, uses up to 1 GB memory: yes lasieve5f - used for huge factorizations, uses up to 1 GB memory: yes Or if you’re running under other account just request the admin of it to create different NFS profiles( default, home, school, etc) allocating the settings mentioned above to one of the profiles. Then on your machine set it to it. |
| 34) Message boards : Questions/Problems/Bugs : Which is what application.
Message 2022 Posted 3 May 2019 by Gigacruncher [TSBTs Pirate]
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In the Preferences it has |
| 35) Message boards : Questions/Problems/Bugs : Queues
Message 2016 Posted 29 Apr 2019 by Gigacruncher [TSBTs Pirate]
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I’m still getting 16w wus therefore I suppose the stats are stuck. |
| 36) Message boards : Questions/Problems/Bugs : Notation
Message 2012 Posted 3 Apr 2019 by Gigacruncher [TSBTs Pirate]
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Here's the poly for GX139_123 (C206 xyyz139_123 139^123+123^139). n: 32030731016440682777065354721302752319396528561887718275010943791422401733138770874875013988992282966916694379386222588227067753509923096299768661077024692164623187468602947896220375896898149402189690061819 # MurphyE(Bf=1.000e+07,Bg=5.000e+06,area=1.000e+16) = 2.107e-15 skew: 758009406.84691 c0: 137590190631534878358422419258553863917875388884862 c1: 164573777586510141237335590511706400855489 c2: -1450105737514750858673830964438693 c3: 464312981092984010304351 c4: 1251482803942791 c5: 1411200 Y0: -12601339721892862582748708202204842976691 Y1: 743324161454990349821163538 type: gnfs lss: 0 alim: 250000000 rlim: 250000000 lpbr: 33 lpba: 33 mfbr: 67 mfba: 96 rlambda: 2.6 alambda: 3.6 |
| 37) Message boards : Questions/Problems/Bugs : Notation
Message 2010 Posted 31 Mar 2019 by Gigacruncher [TSBTs Pirate]
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Hi Davided, Details on Cunningham Numbers can be found here: http://homes.cerias.purdue.edu/~ssw/cun/ OddPerfect: http://www.lirmm.fr/~ochem/opn/ XYYXF: http://www.primefan.ru/xyyxf/default.html Homogeneous Cunningham numbers: https://brnikat.com/nums/anbn/main.htm Cullen and Woodall numbers and their generalization to other bases: https://www.brnikat.com/nums/cullen_woodall/cw.html Brent tables reservations: https://maths-people.anu.edu.au/~brent/factors.html Repunit https://stdkmd.net/nrr/repunit/ Fibonacci and Lucas Factorizations http://mersennus.net/fibonacci/ |
| 38) Message boards : Questions/Problems/Bugs : Notation
Message 2008 Posted 31 Mar 2019 by Gigacruncher [TSBTs Pirate]
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Hi Davide, Welcome aboard NFS@Home. For the Cunningham project notation description please read the following two links: http://homes.cerias.purdue.edu/~ssw/cun/intro And http://homes.cerias.purdue.edu/~ssw/cun/notat Kind regards Carlos |
| 39) Message boards : News : Updates
Message 2004 Posted 28 Mar 2019 by Gigacruncher [TSBTs Pirate]
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Could you upload and link the pastebin of the factorisations done up to 10,311+? TIA. |
| 40) Message boards : Questions/Problems/Bugs : BSOD Memory Managment
Message 1990 Posted 8 Feb 2019 by Gigacruncher [TSBTs Pirate]
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Filipe, Bem vindo ao NFS@Home. De facto precisas de mais memoria para correr o NFS, 16GB não é suficiente para teres 24 aplicações a correr ao mesmo tempo. Sugiro que tenhas pelo menos 1,5 a 2 GB por cada thread. Carlos |