On 27 January 2018, 20:06:08 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:
The prime is 1,728,783 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 7th for Generalized Fermat primes and 57th overall.
The discovery was made by Alen Kecic (freezing) of Germany using an NVIDIA GeForce GTX 1060 in an Intel(R) Core(TM) i7-7820X CPU at 3.60GHz with 32GB RAM, running Windows 10 Professional Edition. This GPU took about 26 minutes to probable prime (PRP) test with GeneferOCL3. Alen is a member of the SETI.Germany team.
The prime was verified on 29 January 2018, 20:09:57 by Arne Sielemann ([SG-FC] dingdong) of Germany using an AMD R9 290/HD 7900 (Tahiti) series GPU in an Intel(R) Core(TM) i7-3770K CPU at 3.50GHz with 16GB RAM, running Windows 10 Core Edition. This GPU took about 56 minutes to probable prime (PRP) test with GeneferOCL5. Arne is a member of the SETI.Germany team.
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 4 hours 33 minutes to complete the primality test using LLR.
For more details please see the official announcement.