Get your goals/badges done quick!


  • October 4th: (Previously announced) The CPU portion of PPS-Sieve will be shut off.
  • October 15th: GFN-15 is very small compared to the computing power of today's computers, and it's no longer eligible for the Top 5000 Primes list.
  • November 15th: SGS has succeeded in its goals of finding an SGS pair and a twin pair at n=1290000 and will be shut down. It's possible we may start a new SGS search at a higher n sometime in the future.
  • December 15th: PPSE is exceptionally unlikely to ever find a Fermat divisor, is very small, and is no longer eligible for the Top 500 Primes list.
  • January 15th, or 30 days after CW-Sieve ends, whichever is later: The GPU portion of PPS-Sieve. This sieve has advanced very far ahead of the PPS projects, and the sieving being done today won't be needed for many years. This sieve is being suspended until more work is needed. In the future it is possible that we may sieve a small subset of k's currently being sieved.
  • March 15th, or 60 days after CW-Sieve ends, whichever is later: AP27 has achieved its goal of finding an AP27 and will shut down. It's extremely unlikely that we will find an AP 28 with the current hardware and software.
More detail on their forum post: https://www.primegrid.com/forum_thre...d=10333#165213