PrimeGrid

On 13 April 2024, 03:42:53 UTC, PrimeGrid's Generalized Fermat Prime Search found the Mega Prime: 8630170^524288+1 The prime is 3,636,472 digits long and will enter “The Largest Known Primes Database” ranked 11th for Generalized Fermat primes and 83rd overall. The discovery was made by Antonio Lucendo (Trotador) of Spain using a dual CPU AMD EPYC 7B13 64-Core Processor @ 2.20GHz with 173GB RAM, running Ubuntu 22.04.3 LTS. This computer took about 4 hours, 45 minutes to complete the probable prime (PRP) test using Genefer22. Antonio Lucendo is a member of the XtremeSystems team. The PRP was confirmed prime on 14 April 2024 by an AMD Ryzen 9 7950X3D @ 4.2GHz, running Debian 12.5. This computer took about 26 hours, 11 minutes to complete the primality test using LLR. For more details, please see the official announcement.

From April 14th 12:14:00 UTC to April 21st 12:14:00 PrimeGrid will be running a 7 day challenge on the Riesel Problem project (TRP). Note the unusual start and end times! For more information, please see this forum thread.