On 4 May 2016, 10:57:07 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:1615588^262144+1The prime is 1,627,477 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 5th for Generalized Fermat primes and 44th overall.The discovery was made by Brook Harste (brinktastee) of the United States using an NVIDIA GeForce GTX 980 Ti in an Intel(R) Core(TM) i7-3820 CPU @ 3.60GHz with 16GB RAM, running Microsoft Windows 10 Professional. This GPU took about 17 minutes to probable prime (PRP) test with GeneferOCL4. Brook is a member of the Aggie The Pew team.The prime was verified on 8 May 2016, 15:28:12 UTC by Róbert Borbély (SosRud) of Hungary using an AMD Cypress in an Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz with 16GB RAM, running Microsoft Windows 10 Professional. This GPU took about 1 hour and 36 minutes to probable prime (PRP) test with GeneferOCL4.For more details, please see the official announcement.

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