On 17 January 2014, 6:53:10 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=59912 by finding the mega prime:
The prime is 1,049,062 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 66th overall. This is the largest known base 5 mega prime. 40 k's now remain in the Sierpinski Base 5 Problem.
The discovery was made by Raymond Ottusch (RaymondFO*) of the United States using an Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz with 24 GB RAM running Linux. This computer took about 3 hours and 41 minutes to complete the primality test using LLR. Raymond is a member of the Sicituradastra team.
The prime was verified on 17 January 2014 20:33:24 UTC, by Michael Wild (Tin Man) of the United Kingdom using an Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz with 4 GB RAM running Darwin. This computer took about 2 hours and 50 minute to complete the primality test using LLR. Michael is a member of the BOINC@AUSTRALIA team.
For more details, please see the official announcement.