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01-15-14, 02:26 PM
On 29 December 2013, 18:56:35 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=37292 by finding the mega prime: 37292*5^1487989+1 (http://primes.utm.edu/primes/page.php?id=116767)The prime is 1,040,065 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 65th overall. This is the largest known base 5 mega prime. 41 k's now remain in the Sierpinski Base 5 Problem.The discovery was made by Stephen R. Cilliers (SteveRC (http://www.primegrid.com/show_user.php?userid=57364)) of South Africa using an Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz with 8 GB RAM running Microsoft Windows 8.1. This computer took about 3 hours and 50 minutes to complete the primality test using LLR. Stephen is a member of the Clifford Welding Systems (http://www.primegrid.com/team_display.php?teamid=2418) team.The prime was verified on 30 December 2013 1:48:41 UTC, by [AF>France>Aquitaine>Cote-Adour-et-Gaves]Bernard 64250 (http://www.primegrid.com/show_user.php?userid=140130) of France using an Intel(R) Core(TM) i3-2330M CPU @ 2.20GHz with 4 GB RAM running Microsoft Windows 7 Home Premium. This computer took about 5 hours and 1 minute to complete the primality test using LLR. [AF>France>Aquitaine>Cote-Adour-et-Gaves]Bernard 64250 is a member of the L'Alliance Francophone (http://www.primegrid.com/team_display.php?teamid=37) team.For more details, please see the official announcement (http://www.primegrid.com/download/SR5-37292.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5465)
More... (http://www.primegrid.com/forum_thread.php?id=5465)