Riesel primes of the form 61•2n-1

Reserved! This sequence is currently part of Multi Reservation 4: RPS Megabit Drive 1.

Current data

k , b : 61 , 2 Count : 55 Nash : 2170 Max n : 3,100,000 Date : 2020-11-12 Reserved : Riesel Prime SearchRiesel Prime Search/Reserved

3, 5, 9, 13, 17, 19, 25, 39, 63, 67, 75, 119, 147, 225, 419, 715, 895, 1025, 1103, 1179, 1345, 1829, 3855, 4159, 4493, 6039, 7799, 9073, 10543, 12883, 23807, 23957, 36163, 44047, 51975, 65573, 79393, 79949, 81987, 86349, 384287, 499175, 762417, 971585, 1124049, 1416365, 1487125, 1654383, 1734983, 2134577, 2381887, 2580689, 2936967, 3286535, 3366033

History

• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2018-04-11: Checked to n = 3000000, RPS 1st Megabit Drive
• 2017-01-30: Found n = 2936967, Thomas Ritschel, RPS 1st Megabit Drive
• 2017-01-30: Found n = 3366033, Rüdiger K. Eckhard
• 2016-06-22: Found n = 3286535, Rüdiger K. Eckhard
• 2015-11-08: Found n = 2580689, Thomas Ritschel, RPS 1st Megabit Drive
• 2012-07-23: Found n = 2381887, Adam Sutton, RPS 1st Megabit Drive
• 2011-11-19: Found n = 2134577, Larry Soule, RPS 1st Megabit Drive
• 2011-05-11: Found n = 1734983, Larry Soule, RPS 1st Megabit Drive
• 2011-03-02: Found n = 1487125, Peter Benson, RPS 1st Megabit Drive
• 2011-02-13: Found n = 1416365, Larry Soule, RPS 1st Megabit Drive
• 2010-11-15: Found n = 1124049, Peter Benson, RPS 1st Megabit Drive
• 2010-10-24: Reserved by RPS 1st Megabit Drive for n > 1000000
• 2009-07-30: Reserved by Borys Jaworski from n=1700000
• 2008-07-24: Found n = 1654383, Peter Benson
• 2008-07-07: Checked to n = 1000000, Gary Barnes released
• 2008-05-25: Checked to n = 965000, Gary Barnes
• 2008-02-17: Found n = 762417, Gary Barnes
• 2008-02-07: Found n = 971585, Peter Benson
• 2008-02-01: Checked to n = 705000, Gary Barnes
• 2008-01-10: Checked to n = 600000, Gary Barnes
• 2008-01-03: Checked n = 400000 - 500000, Gary Barnes
• 2007-12-10: Found n = 499175, Jeffrey Sax
• 2004-12-24: Checked to n = 400000, Predrag Minovic, released
• 2004-12-19: Found n = 384287, Predrag Minovic
• 2004-12-04: Checked to n = 280000, Predrag Minovic
• 2004-08-06: Checked to n = 210000, Steven Harvey, released
• 2004-08-01: Reserved by Steven Harvey from n=200000
• 1994: Found n = 7799, Harvey Dubner