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*[https://www.mersenneforum.org/321search/index.html Overview at 321 Search] at [[MersenneForum]] | *[https://www.mersenneforum.org/321search/index.html Overview at 321 Search] at [[MersenneForum]] | ||
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[[Category:PrimeGrid 321 Prime Search| ]] | [[Category:PrimeGrid 321 Prime Search| ]] | ||
Revision as of 11:41, 5 September 2021
Purpose
PrimeGrid 321 Prime Search is an extension of Paul Underwood’s 321 Search since 2008.
PrimeGrid has added the 3•2n+1 form to the search and will be testing both 3•2n-1 and 3•2n+1 forms beyond n=5000000.
Status
- The current nmax = 21,484,280 as of 2024-04-15 (see Multi Reservation 22).
- 321 Primes Search status at PrimeGrid
Primes found
- 2021-01-20: Riesel 3•216819291-1, Rudi Tapper (Official announcement)
- 2020-10-25: Proth 3•216408818+1, Scott Brown (Official announcement)
- 2015-06-23: Riesel 3•211895718-1, Michael Schulz (Official announcement)
- 2015-03-13: Riesel 3•211731850-1, Karsten Klopffleisch (Official announcement)
- 2014-11-22: Riesel 3•211484018-1, Serhiy Gushchak (Official announcement)
- 2012-01-14: Proth 3•210829346+1, Sai Yik Tang (Official announcement)
- 2011-02-21: Proth 3•27033641+1, Michael Herder (Official announcement)
- 2010-04-24: Riesel 3•26090515-1, David Mumper (Official announcement)
- 2009-04-03: Proth 3•25082306+1, Andy Brady (Official announcement)
- 2008-08-11: Proth 3•22291610+1, Thomas Wolfram (Official announcement)
- 2008-03-23: Riesel 3•24235414-1, Dylan Bennett (Official announcement)
Total: 11 primes found
History
See also
External links
- 321 Prime Search - PrimeGrid forums
- History of 321 Search at MersenneForum
- Overview at 321 Search at MersenneForum
PrimeGrid
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