PrimeGrid World Record Sophie Germain Prime!

[Free-DC]

On 29 February 2016 05:39:14 UTC, PrimeGrid’s Sophie Germain Prime Search found a World Record Sophie Germain prime: 2618163402417*2^1290000-1 (https://primes.utm.edu/primes/page.php?id=121330) (2p+1: 2618163402417*2^1290001-1 (https://primes.utm.edu/primes/page.php?id=121331)) The prime is 388,342 digits long, eclipsing the previous record of 200,701 digits. It enters Chris Caldwell's “The Largest Known Primes Database (http://primes.utm.edu/primes)” ranked 1st for Sophie Germain primes and 3,747th overall. 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(R) Core(TM)2 Quad CPU Q6700 @ 2.66GHz with 4 GB RAM running Microsoft Windows 7 Enterprise. This computer, using LLR, took about 1 hour and 33 minutes to complete the primality test. Scott is a member of the Duke University (http://www.primegrid.com/team_display.php?teamid=154) team. The prime was verified on 29 February 2016 06:21:47 UTC, by Vaughan Davies (vaughan (http://www.primegrid.com/show_user.php?userid=224)) of Australia using an Intel(R) Core(TM) i7-4770S CPU @ 3.10GHz with 32 GB RAM running Microsoft Windows 7 Ultimate. This computer, using LLR, took about 47 minutes to complete the primality test. Vaughan is a member of the AMD Users (http://www.primegrid.com/team_display.php?teamid=14) team. For more details, please see the official announcement (http://www.primegrid.com/download/SGS_2618163402417_1290000.pdf).

More... (http://www.primegrid.com/forum_thread.php?id=6686)