On 22 August 2014, 4:33:59 UTC, PrimeGrid’s 27121 Prime Search, through PRPNet and in collaboration with the 12121 Search (k=27 sister project), has found the mega prime: 27*2^4583717-1
The prime is 1,379,838 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 48th overall.
The discovery was made by Hans Joachim Böhm (SEARCHER) of Germany using an Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz Processor with 4GB RAM, running Microsoft Windows 7 Ultimate. This computer took just over 15 hours 24 minutes to complete the primality test using LLR. Hans is a member of the SETI.Germany team.
For more details, please see the official announcement.