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Difference between revisions of "PrimeGrid 321 Prime Search"
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==Primes found== | ==Primes found== | ||
*2021-01-20: {{NRi|3|16819291}}, [[Rudi Tapper]] ([https://www.primegrid.com/download/321-16819291.pdf Official announcement]) | *2021-01-20: {{NRi|3|16819291}}, [[Rudi Tapper]] ([https://www.primegrid.com/download/321-16819291.pdf Official announcement]) | ||
| − | *2020-10-25: {{NPr|3|16408818}}, [[Scott Brown]] ([https://www.primegrid.com/download/321-16408818.pdf Official announcement]) | + | *2020-10-25: {{NPr|3|16408818}}, [[James Scott Brown]] ([https://www.primegrid.com/download/321-16408818.pdf Official announcement]) |
*2015-06-23: {{NRi|3|11895718}}, [[Michael Schulz]] ([https://www.primegrid.com/download/321-11895718.pdf Official announcement]) | *2015-06-23: {{NRi|3|11895718}}, [[Michael Schulz]] ([https://www.primegrid.com/download/321-11895718.pdf Official announcement]) | ||
*2015-03-13: {{NRi|3|11731850}}, [[Karsten Klopffleisch]] ([https://www.primegrid.com/download/321-11731850.pdf Official announcement]) | *2015-03-13: {{NRi|3|11731850}}, [[Karsten Klopffleisch]] ([https://www.primegrid.com/download/321-11731850.pdf Official announcement]) | ||
Revision as of 05:01, 8 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, James 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
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