Free-DC
04-15-2016, 10:23 PM
On 25 March 2016, 10:34:36 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=296024 by finding the mega prime: 296024*5^2185270-1 (https://primes.utm.edu/primes/page.php?id=121476)The prime is 1,527,444 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 50th overall. This is the largest known base 5 mega prime. 76 k's now remain in the Riesel Base 5 Problem.The discovery was made by Steven Wong (mackerel (http://www.primegrid.com/show_user.php?userid=29980)) of the United Kingdom using an Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz with 16GB RAM running Microsoft Windows 10. This computer took about 15 hours 10 minutes to complete the primality test using LLR. Steven is a member of the Aggie The Pew (http://www.primegrid.com/team_display.php?teamid=2280) team. The prime was verified on 29 March 2016, 09:01:18 UTC by Matthew Borneman (Maxwell [MM] (http://www.primegrid.com/show_user.php?userid=42998)) of the United States using an Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz with 4GB RAM running Microsoft Windows 7 Professional. This computer took about 65 hours 5 minutes to complete the primality test using LLR. Matthew is a member of the SETI.USA (http://www.primegrid.com/team_display.php?teamid=189) team. For more details, please see the official announcement (http://www.primegrid.com/download/SR5-296024.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=6766)
More... (http://www.primegrid.com/forum_thread.php?id=6766)