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Proth primes of the form 21•2n+1
Current data
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Notes
- ↑ Twin n=1
- ↑ Is GF Divisor of xGF(3,11,7)
- ↑ Is GF Divisor of GF(3,8) [+2]
- ↑ Is GF Divisor of xGF(5,7,5) [+2], Twin n=7
- ↑ Is GF Divisor of GF(8,10) [+1]
- ↑ Is GF Divisor of xGF(11,10,9) [+2]
- ↑ Is GF Divisor of xGF(12,7,4) [+1]
- ↑ Is GF Divisor of xGF(14,3,2) [+2]
- ↑ Is GF Divisor of F(39) [+29]
- ↑ Is GF Divisor of GF(120,8) [+1]
- ↑ Is GF Divisor of GF(126,8)
- ↑ Is GF Divisor of xGF(128,7,5)
- ↑ Is GF Divisor of xGF(182,6,5) [+5]
- ↑ Is GF Divisor of xGF(207,8,3) [+1]
- ↑ Is GF Divisor of F(268) [+1]
- ↑ Is GF Divisor of xGF(396,7,5) [+2]
- ↑ Is GF Divisor of xGF(897,9,5)
- ↑ Is GF Divisor of GF(1530,8) [+1]
- ↑ Is GF Divisor of xGF(1608,7,2) [+3]
- ↑ Is GF Divisor of GF(1966,3) [+5]
- ↑ Is GF Divisor of xGF(2244,11,6)
- ↑ Is GF Divisor of xGF(2731,3,2) [+7]
- ↑ Is GF Divisor of GF(4582,8)
- ↑ Is GF Divisor of GF(4642,6) [+1]
- ↑ Is GF Divisor of xGF(6980,5,2) [+5]
- ↑ Is GF Divisor of xGF(13343,5,4)
- ↑ Is GF Divisor of xGF(17523,11,4)
- ↑ Is GF Divisor of xGF(27121,3,2) [+1]
- ↑ Is GF Divisor of GF(29767,7) [+2]
- ↑ Is GF Divisor of xGF(47331,9,8) [+1]
- ↑ Is GF Divisor of GF(55826,8) [+1]
- ↑ Is GF Divisor of xGF(91006,9,7) [+1]
- ↑ Is GF Divisor of F(94798)
- ↑ Is GF Divisor of xGF(164897,7,6) [+2]
- ↑ Is GF Divisor of xGF(191336,7,5) [+2]
- ↑ Is GF Divisor of xGF(200565,11,4)
- ↑ Is GF Divisor of xGF(220991,5,4) [+1]
- ↑ Is GF Divisor of xGF(686629,3,2)
- ↑ Is GF Divisor of xGF(856860,4,3) [+3]
- ↑ Is GF Divisor of GF(1022165,8) [+2]
- ↑ Is GF Divisor of xGF(1240064,3,2) [+5]
- ↑ Is GF Divisor of GF(1421740,11) [+1]
- ↑ Is GF Divisor of xGF(1830917,9,7)
- ↑ Is GF Divisor of xGF(3065699,9,7) [+1]
- ↑ Is GF Divisor of GF(6048860,5) [+4]
History
- 2021-04-01: Checked to n = 9000000, PrimeGrid Fermat Divisor Search
- 2020-06-04: Found n = 6048861, Ken Glennie, PrimeGrid Fermat Divisor Search
- 2012-12-23: Found n = 3065701, Serge Batalov
- 2005-01-18: Found n = 1421741, Curtis Cooper
- 2004-11-04: Found n = 1830919, Curtis Cooper
- 2004-07-20: Found n = 1240067, Curtis Cooper
- 2004-06-21: Found n = 1022168, Curtis Cooper
- 2004-05-31: Found n = 856865, Curtis Cooper
- 2004-05-21: Found n = 686632, Curtis Cooper
- 2001-06-18: Found n = 220992, Sturle Sunde
- 2000-10-12: Found n = 200568, Jukka Santala
- 2000-09-05: Found n = 191337, Greg Hewgill
- 2000-01-05: Found n = 179457, Patrick Pirson
- 1999-04-29: Found n = 164901, John Cosgrave
- 1995-08: Found n = 94801, Jeffrey Young
- 1995-08: Found n = 91008, Jeffrey Young
- 1995-08: Found n = 55828, Jeffrey Young
- 1995-08: Found n = 47337, Jeffrey Young
- 1993-03: Found n = 27124, Harvey Dubner
- 1993-01: Found n = 29769, Harvey Dubner
- 1992: Found n = 17524, Harvey Dubner
- 1988: Found n = 13344, Wilfrid Keller
- 1983: Found n = 6981, Wilfrid Keller
- 1983: Found n = 6712, Wilfrid Keller
- 1983: Found n = 4644, Wilfrid Keller
- 1983: Found n = 4585, Wilfrid Keller
- 1979: Checked n = 1500 - 4000, Gordon V. Cormack, Hugh C. Williams
- 1979: Found n = 2733, Gordon V. Cormack, Hugh C. Williams
- 1979: Found n = 2245, Gordon V. Cormack, Hugh C. Williams
- 1979: Found n = 1969, Gordon V. Cormack, Hugh C. Williams
- 1979: Found n = 1613, Gordon V. Cormack, Hugh C. Williams
- 1979: Found n = 1532, Gordon V. Cormack, Hugh C. Williams