Following Bruce Dodson's discovery today of a factor of 6,334+ by ECM pretesting, another result is in! The composite cofactor of 12,233- was the product of 64-digit and 151-digit prime numbers:

64-digit prime factor:
3430037246191599131735595170257684385396651267213817380250534229

151-digit prime factor:
6484406736634491573922582264649804155909832141404052849394594252973943110547988776790661148571492890286416570295464462420010404765102687593528997076743

Thanks to Carlos Pinho for donating computer time for the postprocessing of this number. As usual, the factors will be reported to the Cunningham project, and will be recorded on Page 113. Many more to go!