On 15 July 2017, 21:04:54 UTC, PrimeGrid?s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

<b><a href="http://primes.utm.edu/primes/page.php?id=123748" rel="nofollow">46776558^131072+1 </a></b>

The prime is 1,005,326 digits long and enters <b><a href="http://primes.utm.edu/primes" rel="nofollow">Chris Caldwell's The Largest Known Primes Database</a></b> ranked 24th for Generalized Fermat primes and 240th overall.

The discovery was made by Giles Averay-Jones (<b><a href="https://www.primegrid.com/show_user.php?userid=125" rel="nofollow">Dingo</a></b&gt of Australia using an AMD Radeon 7700 series GPU in an Intel(R) Core(TM) i7-4771 CPU at 3.60GHz with 16GB RAM, running Microsoft Windows 10 Core Edition. This GPU took about 41 minutes to probable prime (PRP) test with GeneferOCL2. Giles is a member of the <b><a href="http://www.primegrid.com/team_display.php?teamid=25" rel="nofollow">BOINC@AUSTRALIA</a></b> team.

The prime was verified on 15 July 2017, 22:10:39 UTC by Dirk Sellsted (<b><a href="https://www.primegrid.com/show_user.php?userid=492091" rel="nofollow">Dirk Sellsted</a></b&gt of Canada using an Nvidia Geforce GTX 1080 Ti GPU in an AMD Ryzen 7 1800X CPU with 32GB RAM, running Microsoft Windows 10 Core Edition. This GPU took about 6 minutes to probable prime (PRP) test with GeneferOCL2.

The PRP was confirmed prime by an Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz with 16GB RAM, running Microsoft Windows 7 Ultimate Edition. This computer took about 2 hours 45 minutes to complete the primality test using LLR.

For more details, please see the <b><a href="http://www.primegrid.com/download/GFN-46776558_131072.pdf" rel="nofollow">official announcement</a></b>.