On 26 April 2017, 17:34:00 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:
The prime is 1,004,469 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 23rd for Generalized Fermat primes and 230th overall.
The discovery was made by Jeffrey Mangio (Novanglus) of the United States using an NVIDIA GeForce GTX 1080 in an Intel(R) Core(TM) i5-4690K CPU at 3.50GHz with 16GB RAM, running Microsoft Windows 10 Core Edition. This GPU took about 9 minutes to probable prime (PRP) test with GeneferOCL4. Jeffrey is a member of the SETI.USA team.
The prime was verified on 27 April 2017, 13:33:00 UTC by Osamu Andou (o-ando) of Japan using an NVIDIA GeForce GTX 1060 in an Intel(R) Core(TM) i7-6700 CPU at 3.40GHz with 16GB RAM, running Microsoft Windows 10 Professional Edition. This GPU took about 13 minutes to probable prime (PRP) test with GeneferOCL4.
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 1 hour 29 minutes to complete the primality test using LLR.
For more details, please see the official announcement.