On 28 December 2017, 05:55:36 UTC, PrimeGrid’s PPS Mega Prime Search project found the Mega Prime:
The prime is 1,040,139 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 209th overall.
The discovery was made by Josh Closs (Josh Closs) of the United States using an Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz with 16GB RAM, running Microsoft Windows 10 Core Edition. This computer took about 57 minutes to complete the primality test using LLR. Josh is a member of the Crunch Squad team.
The prime was verified on 29 December 2017, 12:08:17 UTC by Howard Gordon ([PST]Howard) of the United Kingdom using an AMD Ryzen 7 1800X CPU with 16GB RAM, running Microsoft Windows 10 Core Edition. This computer took about 1 hour 30 minutes to complete the primality test using LLR. Howard is a member of the PrimeSearchTeam team.
For more details, please see the official announcement.