On 1 March 2018, 04:16:07 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:
The prime is 1,743,828 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 7th for Generalized Fermat primes and 56th overall.
The discovery was made by Wolfgang Schwieger (DeleteNull) of Germany using an NVIDIA GeForce GTX 1070 Ti in an Intel(R) CPU at 2.30GHz with 32GB RAM, running Windows 10 Professional Edition. This GPU took about 18 minutes to probable prime (PRP) test with GeneferOCL3. Wolfgang is a member of the SETI.Germany team.
The prime was verified on 1 March 2018, 04:28:47 by Jonathan Sipes (k4m1k4z3) of the United States using an NVIDIA GeForce GTX 1080 GPU in an Intel(R) Core(TM) i7-2700K CPU at 3.50GHz with 8GB RAM, running Windows 7 Professional Edition. This GPU took about 20 minutes to probable prime (PRP) test with GeneferOCL3. Jonathan is a member of the Overclock.net team.
The PRP was confirmed prime by an Intel(R) Xeon(R) E3-1240 v6 CPU @ 3.70GHz with 2GB RAM, running Linux. This computer took about 5 hours 33 minutes to complete the primality test using LLR.
For more details, please see the official announcement.