SR5 Mega Prime!
On 17 August 2014, 13:00:59 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=133778 by finding the mega prime: 133778*5^1785689+1The prime is 1,248,149 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 56th overall. This is the largest known base 5 mega prime. 38 k's now remain in the Sierpinski Base 5 Problem.The discovery was made by Guo Hua Miao (????) of China using an Intel Xeon(R) CPU E5-4617 @ 2.90GHz with 504GB RAM running Linux. This computer took about 27 hours and 9 minutes to complete the primality test using LLR. Guo is a member of the Team China team.For more details, please see the official announcement.

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