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10-09-16, 07:01 PM
On 8 October 2016, 21:01:14 UTC, PrimeGrid’s PRPNet found the largest known generalized Cullen prime:682156*79^682156+1 (http://primes.utm.edu/primes/page.php?id=122349)The prime is 1,294,484 digits long and enters Chris Caldwell's The Largest Known Primes Database (https://primes.utm.edu/primes) ranked 1st for generalized Generalized Cullen and Generalized Cullen-Woodall primes and 83rd overall. The discovery was made by Franz-Xaver Harvanek (XAVER (http://www.primegrid.com/show_user.php?userid=450130)) of Austria using an Intel(R) Core(TM) i7-5960X CPU @ 3.00GHz with 32GB RAM, running Microsoft Windows 7 Ultimate. This computer took 3 hours and 44 minutes to complete the primality test using LLR. For more details, please see the official announcement (http://www.primegrid.com/download/gc79-682156.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=7057)
More... (http://www.primegrid.com/forum_thread.php?id=7057)