On 26 May 2011 11:08:52 UTC, PrimeGrid’s The Riesel Problem project eliminated k=141941 by finding the mega prime: 141941*2^4299438-1The prime is 1,294,265 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 25th overall. This is the largest prime found in The Riesel Problem and PrimeGrid's sixth elimination. 58 k's now remain.The discovery was made by Scott Brown (Scott Brown) of the United States using an Intel Core2 Duo E8400 @ 3.0GHz with 4 GB RAM running Windows 7. This computer took just over 7 hours and 25 minutes to complete the primality test using LLR. Scott is a member of the Duke University team.The prime was verified on 28 May 2011 23:08:20 UTC, by Piotr M. Zalewski (Piotr M. Zalewski) of Poland. For more details, please see the official announcement.

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