On 15 January 2018, 01:27:20 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:
The prime is 3,289,511 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 2nd for Generalized Fermat primes and 22nd overall.
The discovery was made by Scott Brown (Scott Brown) of the United States using an NVIDIA GeForce GTX 960 in an Intel(R) Core(TM) i7-2600 CPU at 3.40GHz with 8GB RAM, running Windows 10 Core Edition. This GPU took about 2 hours 27 minutes to probable prime (PRP) test with GeneferOCL4. Scott is a member of the Aggie The Pew team.
The prime was verified on 15 January 2018, 13:47:11 UTC by user tangwei@CN of China using an NVIDIA GeForce GTX 1070 in an Intel(R) Xeon(R) E3-1230v2 CPU @ 3.30GHz with 8GB RAM, running Windows 10 Professional Edition. This GPU took about 59 minutes to probable prime (PRP) test with GeneferOCL4. Tangwei@CN is a member of Team China.
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 40 minutes to complete the primality test using LLR.
For more details, please see the official announcement.