AMDave
08-06-2014, 09:18 AM
New SR5 Mega Prime!
On 23 July 2014, 5:52:51 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=24032 by finding the mega prime: 24032*5^1768249+1 (http://primes.utm.edu/primes/page.php?id=118241) The prime is 1,235,958 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 54th overall. This is the largest known base 5 mega prime. 39 k's now remain in the Sierpinski Base 5 Problem. The discovery was made by Hiroyuki Okazaki (zunewantan (http://www.primegrid.com/show_user.php?userid=277353)) of Japan using an Intel Xeon CPU E31220 @ 3.10GHz with 4GB RAM running Microsoft Windows Server 2008. This computer took about 3 hours and 16 minutes to complete the primality test using LLR. Hiroyuki is a member of the Aggie The Pew (http://www.primegrid.com/team_display.php?teamid=2280) team. The prime was verified on 23 July 2014, 8:30:46 UTC, by Vincent Ollivier (MohMan (http://www.primegrid.com/show_user.php?userid=146912)) of Canada using an Intel Core i7-3770 CPU @ 3.40GHz with 8 GB RAM running Microsoft Windows 7 Professional. This computer took about 6 hours and 38 minutes to complete the primality test using LLR. Vincent is a member of the SUPINFO (http://www.primegrid.com/team_display.php?teamid=4244) team. For more details, please see the official announcement (http://www.primegrid.com/download/SR5-24032.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5844)
On 23 July 2014, 5:52:51 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=24032 by finding the mega prime: 24032*5^1768249+1 (http://primes.utm.edu/primes/page.php?id=118241) The prime is 1,235,958 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 54th overall. This is the largest known base 5 mega prime. 39 k's now remain in the Sierpinski Base 5 Problem. The discovery was made by Hiroyuki Okazaki (zunewantan (http://www.primegrid.com/show_user.php?userid=277353)) of Japan using an Intel Xeon CPU E31220 @ 3.10GHz with 4GB RAM running Microsoft Windows Server 2008. This computer took about 3 hours and 16 minutes to complete the primality test using LLR. Hiroyuki is a member of the Aggie The Pew (http://www.primegrid.com/team_display.php?teamid=2280) team. The prime was verified on 23 July 2014, 8:30:46 UTC, by Vincent Ollivier (MohMan (http://www.primegrid.com/show_user.php?userid=146912)) of Canada using an Intel Core i7-3770 CPU @ 3.40GHz with 8 GB RAM running Microsoft Windows 7 Professional. This computer took about 6 hours and 38 minutes to complete the primality test using LLR. Vincent is a member of the SUPINFO (http://www.primegrid.com/team_display.php?teamid=4244) team. For more details, please see the official announcement (http://www.primegrid.com/download/SR5-24032.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5844)