On 9 Nov 2015, 18:02:51 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:
The prime is 1,000,075 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 14th for Generalized Fermat primes and 143rd overall. Of note, this find appears to be the first Titanic prime (>= 1000 digits) found using fixed-point numbers.
The discovery was made by Andrew M. Farrow (Nortech) of Australia using an NVIDIA GeForce GTX 960 in an Intel(R) Core(TM) i3-4170 CPU @ 3.70GHz with 4GB RAM running Linux. This GPU took about 1 hour 2 minutes to probable prime (PRP) test with GeneferOCL2.
The prime was verified by Patrick Schöfer (pschoefer) of Germany using an NVIDIA GeForce GTX 660 Ti in an Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz with 16GB RAM running Windows 7 Professional. This computer took about 47 minutes to probable prime (PRP) test with GeneferOCL2. Patrick is a member of the SETI.Germany team.
For more details, please see the official announcement.