On 6 November 2019, 11:59:08 UTC, PrimeGrid's Generalized Fermat Prime Search found the Mega Prime:
The prime is 1,821,535 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 14th for Generalized Fermat primes and 80th overall.
The discovery was made by Rod Skinner (rjs5) of the United States using a GeForce RTX 2080 Ti in an Intel(R) Core(TM) i9-9980XE CPU @ 3.00GHz with 63GB RAM, running Linux Fedora. This GPU took about 8 minutes to complete the probable prime (PRP) test using Genefer OCL2. Rod Skinner is a member of Intel Corporation team.
The prime was verified on 6 November 2019, 14:33:32 UTC by Tom Greer (tng*) of the United States using a GeForce RTX 2070 SUPER in an Intel(R) Core(TM) i9-9900X CPU @ 3.50GHz with 32GB RAM, running Microsoft Windows 10. This GPU took about 13 minutes to complete the probable prime (PRP) test using Genefer OCL2. Tom Greer is a member of the Sicituradastra. team.
The PRP was confirmed prime by an Intel(R) Xeon(R) E3-1240 v6 CPU @ 3.70GHz with 32 GB RAM, running Debian Linux. This computer took about 17 hours 30 minutes to complete the primality test using LLR.
For more details, please see the official announcement.