PrimeGrid Another GFN-262144 Mega Prime!

[Newshound]

On 14 December 2018, 07:07:34 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

6291332^262144+1

The prime is 1,782,250 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 10th for Generalized Fermat primes and 66th overall.

The discovery was made by Karsten Freihube (KFR) of Germany using an NVIDIA GeForce GTX 1060 in an Intel(R) Core(TM) i7-4790 CPU at 3.60GHz with 16GB RAM, running Windows 10 Proffesional Edition. This GPU took about 35 minutes to probable prime (PRP) test with GeneferOCL2.

The prime was verified on 14 December 2018, 14:47:41 by Andreas Zenker (Buddy) of Austria Republic using an NVIDIA GeForce GTX 1060 GPU in an Intel(R) Core(TM)2 Quad CPU at 2.50GHz 4GB RAM, running Windows 7 Professional Edition. This GPU took about 42 minutes to probable prime (PRP) test with GeneferOCL2. Andreas is a member of Team PC-Reflate.

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 4 hours 59 minutes to complete the primality test using LLR.

For more details, please see the official announcement.


SOURCE http://www.primegrid.com/forum_thread.php?id=8355