We are updating the operating system on our servers on Tuesday, August 21, beginning at 14:00 UTC.
By world community grid at 2018-08-15
There are no more 25-100k sievefiles left except R7 and S66. I will start soon 100-300k ranges outside average apps.
By srbase at 2018-08-15
On 4 August 2018, 09:10:53 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime: [Link] 2312092^524288+1 The prime is 3,336,572 digits long and enters [Link] Chris Caldwell's The Largest Known Primes Database ranked 2nd for Generalized Fermat primes and 24th overall. The discovery was made by Rob Gahan ([Link] Robish) of Ireland using an NVIDIA GeForce GTX 690 in an Intel(R) Core(TM) i7-3930K CPU at 3.20GHz with 12GB RAM, running Windows 10 Professional Edition. This GPU took about 2 hours 36 minutes to probable prime (PRP) test with GeneferOCL5. Rob is a member of the [Link] Storm team. The prime was verified on 4 August 2018, 23:28:14 UTC by Naoaki Tokuda ([Link] semanterion) of Japan using an NVIDIA Titan V in an Intel(R) Core(TM) i7-4960X CPU @ 3.60GHz with 64GB RAM, running Windows 7 Ultimate Edition. This GPU took about 24 minutes to probable prime (PRP) test with GeneferOCL5. The PRP was confirmed prime by an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16GB RAM, running Microsoft Windows 10 Professional. This computer took about 20 hours 55 minutes to complete the primality test using LLR. For more details, please see the [primegrid at 2018-08-11