[PrimeGrid] 321 Mega Prime!

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[PrimeGrid] 321 Mega Prime!

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On 6 September 2021, 07:16:28 UTC, PrimeGrid's 321 Search found the Mega Prime: 3*2^17748034-1 The prime is 5,342,692 digits long and enters Chris Caldwell's “The Largest Known Primes Database” ranked 18th overall. The discovery was made by Marc Wiseler (McDaWisel) of Ireland using an AMD Ryzen 9 5900X 12-Core Processor with 16GB RAM, running Microsoft Windows 10 Professional x64 Edition. This computer took about 2 hours, 45 minutes to complete the primality test using LLR2. Marc Wiseler is a member of the Storm team. The prime was verified on 6 September 2021, 11:47 UTC, by an Intel(R) Core(TM) i7-9800X CPU @ 3.80GHz with 32GB of RAM, running CentOS. This computer took 2 hours and 41 minutes to complete the primality test using LLR2. For more details, please see the official announcement.

Source: http://www.primegrid.com/forum_thread.php?id=9757
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