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10-10-13, 10:02 AM
On 5 October 2013, 19:06:07 UTC, PrimeGrid’s The Riesel Problem project eliminated k=398023 by finding the mega prime: 398023*2^6418059-1 (http://primes.utm.edu/primes/page.php?id=115858)The prime is 1,932,034 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 23rd overall. This is the largest prime found in The Riesel Problem and PrimeGrid's 10th elimination. 54 k's now remain.The discovery was made by Vladimir Volynsky (Grey (http://www.primegrid.com/show_user.php?userid=141711)) of Russia using an Intel(R) Core(TM) i7- 3820 CPU @ 3.60GHz with 16 GB RAM running Windows 7 x64. This computer took 12 hours 43 minutes to complete the primality test using LLR. Vladimir is a member of the Russia (http://www.primegrid.com/team_display.php?teamid=45) team.The prime was verified on 8 October 2013, 00:48:18 UTC, by Wolfgang Schwieger (DeleteNull (http://www.primegrid.com/show_user.php?userid=2663)) of Germany using an Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz with 16 GB RAM running Linux. This computer took 10 hours 4 minutes to complete the primality test using LLR. Wolfgang is a member of the Nemesis Germany (http://www.primegrid.com/team_display.php?teamid=2105) team.For more details, please see the official announcement (http://www.primegrid.com/download/TRP-398023.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5295)
More... (http://www.primegrid.com/forum_thread.php?id=5295)