On 16 February 2020, 01:13:42 UTC, PrimeGrid's Generalized Fermat Prime Search found the Mega Prime:
The prime is 1,832,857 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 15th for Generalized Fermat primes and 87th overall.
The discovery was made by Tom Greer (tng*) of the United States using an NVidia GeForce RTX 2070 in an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16GB RAM, running Microsoft Windows 10 Core x64 Edition. This GPU took about 17 minutes to complete the probable prime (PRP) test using GeneferOCL2. Tom Greer is a member of the Sicituradastra. team.
The prime was verified on 16 February 2020, 01:39:49 UTC by Viktor Svantner (Viktor Svantner) of the Czech Republic using a GeForce GTX 1080 Ti in an AMD Ryzen Threadripper 2990WX 32-Core Processor with 128GB RAM, running Microsoft Windows 10 Professional x64 Edition. This computer took about 22 minutes to complete the probable prime (PRP) test using GeneferOCL2. Viktor Svantner is a member of the Czech National Team team.
The PRP was confirmed prime by an Intel(R) Xeon(R) CPU E3-1240 v6 @ 3.70GHz with 4GB RAM, running Linux Debian. This computer took about 6 hours, 6 minutes to complete the primality test using LLR.
For more details, please see the official announcement.