On 12 Feb 2012, 3:48:23 UTC, PrimeGrid’s Generalized Fermat Prime Search found the mega prime: 676754^262144+1
The prime is 1,528,413 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 2nd for Generalized Fermat Primes and 23rd overall. This is the 2nd Top 25 prime in 3 weeks. A nice beginning for the new Generalized Fermat Prime Search. The primes are only going to get bigger. :)
The discovery was made by Carlos Loureiro (Usucapio Libertatis) of Portugal using an NVIDIA GeForce GTX 550 Ti in an Intel Core i5-2500K @ 3.30GHz system with 4GB RAM, running Windows 7 Ultimate x64. This GPU took about 1 hour 30 minutes to probable prime (PRP) test with GenefCUDA. Carlos is a member of the Blasfemias team.
The PRP was verified on 12 Feb 2012, 8:33:09 UTC, by Peter Verstappen (verstapp) of Australia. For more details, please see the official announcement.