Riesel primes of the form 51•2n-1

Current data

k , b : 51 , 2 Type : 3 Count : 40 Nash : 1550 Max n : 5,100,000 Date : 2021-03-21

1, 9, 10, 19, 22, 57, 69, 97, 141, 169, 171, 195, 238, 735, 885, 1287, 1365, 2026, 2211, 2361, 2889, 3159, 3709, 5031, 19066, 33622, 43162, 188517, 194875, 217971, 286965, 331546, 468417, 657705, 832630, 845494, 1026910, 1027635, 1231665, 5085142

Remarks :

The sequence A050551 in OEIS

History

• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2014-08-12: Checked n = 1000000 - 1620000, 1687162 - 2500000, RPS Megabit Drive 1 released
• 2014-08-11: Checked n = 2500000 - 5100000, Peter Riesen, released
• 2014-08-04: Found n = 5085142, Peter Riesen
• 2013-10-27: Checked n = 3600000 - 3700000, Peter Riesen, results included
• 2013-10-27: Checked n = 3500000 - 3600000, Peter Riesen, results included
• 2013-02-24: Checked to n = 3500000, Peter Riesen
• 2012-08-10: Checked to n = 3300000, Peter Riesen
• 2012-03-11: Checked to n = 3140000, Peter Riesen
• 2011-11-14: Checked to n = 2980000, Peter Riesen
• 2011-02-27: Checked to n = 2650000, Peter Riesen
• 2010-12-05: Found n = 1231665, Carlos Eduardo Pinho, RPS Megabit Drive 1
• 2010-10-27: Found n = 1027635, Larry Soule, RPS Megabit Drive 1
• 2010-10-27: Found n = 1026910, Larry Soule, RPS Megabit Drive 1
• 2010-10-24: Reserved by RPS Megabit Drive 1 for n > 1000000
• 2010-10-19: Reserved by Peter Riesen from n=2500000
• 2009-07-30: Reserved by Borys Jaworski for sieving only n=1700000-5000000
• 2009-07-26: Checked n = 1620000 - 1652145?, (unknown), See range done at RPS other completed ranges.
• 2009-01-09: Checked n = 950000 - 995409, 1652145 - 1687162, Peter Benson
• 2008-01-03: Checked n = 870000 - 1000000?, Predrag Minovic ?
• 2008-01-03: Checked to n = 870000, RPS Drive 5, released
• 2008-01-02: 845494 confirmed, Larry Soule, RPS Drive 5 (In file but not announced.)
• 2007-12-08: 832630 confirmed, David Metcalfe, RPS Drive 5
• 2007-04-13: Found n = 845494, Peter Benson
• 2007-04-07: Found n = 832630, Peter Benson
• 2007-06-11: Found n = 657705, J. Craig Brunson, RPS Drive 5
• 2006-11-12: Reserved by RPS Drive 5, for n > 475000
• 2004-11-26: Checked to n = 475000, Jeffrey Sax
• 2004-11-26: Found n = 468417, Jeffrey Sax
• 2004-10-15: Found n = 331546, Jeffrey Sax
• 2004-10-08: Found n = 286965, Jeffrey Sax
• 2004-10-01: Found n = 217971, Jeffrey Sax
• 2004-08-01: Checked to n = 210000, Steven Harvey, released
• 2004-07-26: Reserved by Steven Harvey from n=200000
• 2004-05-19: Found n = 194875, Andrew Walker
• 2004-05-19: Found n = 188517, Andrew Walker
• 1999-04-26: Found n = 33622, Dale Andrews