PrimeGrid: Mega Prime found for The Riesel Problem

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On 26 May 2011 11:08:52 UTC, PrimeGrid’s The Riesel Problem project eliminated k=141941 by finding the mega prime: 141941*2^4299438-1 (http://primes.utm.edu/primes/page.php?id=100232)The prime is 1,294,265 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) 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 (http://www.primegrid.com/show_user.php?userid=1178)) 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 (http://www.primegrid.com/team_display.php?teamid=154) team.The prime was verified on 28 May 2011 23:08:20 UTC, by Piotr M. Zalewski (Piotr M. Zalewski (http://www.primegrid.com/show_user.php?userid=39053)) of Poland. For more details, please see the official announcement (http://www.primegrid.com/download/trp-141941.pdf).

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