PrimeGrid GFN-262144 Mega Prime!

[Newshound]

On 30 October 2017, 01:31:18 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

3547726^262144+1

The prime is 1,717,031 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 6th for Generalized Fermat primes and 53rd overall.

The discovery was made by Scott Brown (Scott Brown) of the United States using a Nvidia GeForce GTX 1080 Ti in an Intel(R) Xeon(R) E5-1650 v3 CPU at 3.50GHz with 32GB RAM, running Microsoft Windows 7 Enterprise Edition. This GPU took about 17 minutes to probable prime (PRP) test with GeneferOCL3. Scott is a member of the Aggie The Pew team.

The prime was verified on 30 October 2017, 11:31:11 UTC by Alexander Falk (Alexander Falk) of the United States using an NVidia GeForce GTX 1080 GPU in an Intel(R) Core(TM) i7-7700K CPU at 4.20GHz with 64GB RAM, running Microsoft Windows 10 Professional Edition. This GPU took about 18 minutes to probable prime (PRP) test with GeneferOCL3. Alexander is a member of The Knights Who Say Ni! team.

The PRP was confirmed prime by an Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz with 24GB RAM, running Microsoft Windows 7 Professional Edition. This computer took about 12 hours 30 minutes to complete the primality test using multithreaded LLR.

For more details, please see the official announcement.


SOURCE http://www.primegrid.com/forum_thread.php?id=7679