On 21 October 2016, 18:12:50 UTC, PrimeGrid’s PPS Mega Prime Search project found the Mega Prime: 597*2^3322871+1 The prime is 1,000,287 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 197th overall. The discovery was made by Randall Scalise (Randall J. Scalise) of the United States using an Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz with 8GB RAM, running Linux. This computer took about 1 hour 11 minutes to complete the primality test using LLR. The prime was verified on 22 October 2016 00:51:34 UTC, by Lucas Brown (LucasBrown) of the United States using an Intel(R) Core(TM) i7-6700K CPU @ 4GHz with 64GB RAM running Linux. This computer took about 46 minutes to complete the primality test using LLR. Lucas is a member of the XKCD team. For more details, please see the official announcement.

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