AMDave
07-12-2015, 11:51 PM
321 Mega Prime! (2015 Edition, part 2)
On 23 June 2015 20:49:21 UTC, PrimeGrid’s 321 Prime Search project found the mega prime: 3*2^11895718-1 (http://primes.utm.edu/primes/page.php?id=120038)The prime is 3,580,969 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 12th overall. This is the largest known 321 mega prime and the largest prime found to date at PrimeGrid!The discovery was made by Michael Schulz (Michael Schulz (http://www.primegrid.com/show_user.php?userid=382463)) of Germany using an Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz with 16 GB RAM running Darwin 14.3.0. This computer took about 9 hours and 57 minutes to complete the primality test using LLR. The prime was verified on 27 June 2015 3:56:03 UTC, by user Matthew (http://www.primegrid.com/show_user.php?userid=237689) of New Zealand using an Intel(R) Core(TM) i7-4510U CPU @ 2.00GHz with 8 GB RAM running Windows 7 Professional. This computer took about 33 hours and 40 minutes to complete the primality test using LLR. For more details, please see the official announcement (http://www.primegrid.com/download/321-11895718.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=6364)
On 23 June 2015 20:49:21 UTC, PrimeGrid’s 321 Prime Search project found the mega prime: 3*2^11895718-1 (http://primes.utm.edu/primes/page.php?id=120038)The prime is 3,580,969 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 12th overall. This is the largest known 321 mega prime and the largest prime found to date at PrimeGrid!The discovery was made by Michael Schulz (Michael Schulz (http://www.primegrid.com/show_user.php?userid=382463)) of Germany using an Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz with 16 GB RAM running Darwin 14.3.0. This computer took about 9 hours and 57 minutes to complete the primality test using LLR. The prime was verified on 27 June 2015 3:56:03 UTC, by user Matthew (http://www.primegrid.com/show_user.php?userid=237689) of New Zealand using an Intel(R) Core(TM) i7-4510U CPU @ 2.00GHz with 8 GB RAM running Windows 7 Professional. This computer took about 33 hours and 40 minutes to complete the primality test using LLR. For more details, please see the official announcement (http://www.primegrid.com/download/321-11895718.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=6364)