Riesel primes of the form 181•2n-1

Reserved! This sequence is currently part of Multi Reservation 7: NPLB K300 Drive 1.

Current data

k , b : 181 , 2 Count : 70 Nash : 2940 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 5, 7, 9, 11, 17, 23, 31, 35, 43, 47, 83, 85, 99, 101, 195, 267, 281, 363, 391, 519, 623, 653, 673, 701, 1091, 1147, 1565, 3273, 3661, 3923, 4127, 4783, 5267, 5345, 5747, 6151, 6299, 7569, 9033, 11843, 14139, 14175, 15779, 21557, 32295, 49823, 60979, 65195, 132367, 133895, 186827, 212647, 268299, 293551, 308759, 327407, 334579, 400849, 458303, 491487, 553989, 563997, 655067, 823853, 1032023, 1186763, 1250169, 1281453, 2570921

History

• 2024-08-05: Found n = 2570921, Florian Piesker, NPLB K300 Drive 1
• 2024-05-16: Reserved by NPLB K300 Drive 1 for n > 2300000
• 2022-04-10: Checked to n = 2300000, RPS Megabit Drive 2
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2019-08-18: Checked to n = 2200000, RPS Megabit Drive 2
• 2015-06-19: Reserved by RPS Megabit Drive 2 for n > 2000000
• 2014-10-05: Checked to n = 2000000, Predrag Minovic, released
• 2013-09-08: Checked to n = 1800000, Predrag Minovic
• 2013-07-09: Checked to n = 1760000, Predrag Minovic
• 2013-01-04: Checked to n = 1650000, Predrag Minovic
• 2012-07-02: Checked to n = 1440000, Predrag Minovic
• 2012-05-04: Checked to n = 1385000, Predrag Minovic
• 2011-12-31: Checked to n = 1350000, Predrag Minovic
• 2011-12-13: Found n = 1250169, Predrag Minovic
• 2011-10-14: Found n = 1281453, Thomas Ritschel
• 2011-10-12: Found n = 1186763, Predrag Minovic
• 2010-07-18: Checked to n = 1100000, Predrag Minovic
• 2010-04-11: Checked to n = 1050000, Predrag Minovic
• 2010-02-18: Found n = 1032023, Predrag Minovic
• 2010-02-11: Checked to n = 1020000, Predrag Minovic
• 2010-01-17: Checked to n = 1010000, Predrag Minovic
• 2009-12-05: Checked to n = 920000, Predrag Minovic
• 2009-11-20: Checked to n = 900000, Predrag Minovic
• 2009-11-18: Reserved by Predrag Minovic
• 2009-11-18: Checked to n = 898000, Larry Soule, released
• 2007-07-23: Checked to n = 892000, Larry Soule
• 2007-06-25: Checked to n = 871000, Larry Soule
• 2007-04-11: Found n = 823853, Larry Soule
• 2007-03-19: Checked to n = 804000, Larry Soule
• 2007-01-21: Checked to n = 756000, Larry Soule
• 2006-12-01: Checked to n = 691000, Larry Soule
• 2006-10-31: Found n = 655067, Larry Soule
• 2006-10-13: Checked to n = 633000, Larry Soule
• 2006-08-25: Reserved by Larry Soule from n=600000
• 2006-07-13: Found n = 563997, Predrag Minovic, RPS Drive 2
• 2006-07-05: Found n = 553989, Larry Soule, RPS Drive 2
• 2006-06-07: Found n = 491487, David Metcalfe, RPS Drive 2
• 2006-05-21: Found n = 458303, Predrag Minovic, RPS Drive 2
• 2006-05-07: Found n = 400849, Predrag Minovic, RPS Drive 2
• 2006-04-17: Found n = 334579, Valerie Vonck, RPS Drive 2
• 2006-04-10: Found n = 327407, Larry Soule, RPS Drive 2
• 2006-04-06: Found n = 308759, Larry Soule, RPS Drive 2
• 2006-04-01: Found n = 293551, David Metcalfe, RPS Drive 2
• 2006-03-28: Found n = 268299, Larry Soule, RPS Drive 2
• 2006-03-18: Found n = 212647, Predrag Minovic, RPS Drive 2
• 2006-03-17: Reserved by RPS Drive 2, for n = 210000 - 600000
• 2005-01-12: Checked to n = 210000, Steven Harvey, released
• 2005-01-10: Reserved by Steven Harvey from n=200000
• 2004-08-17: Found n = 186827, Jocelyn Larouche
• 2000-01-16: Found n = 65195, Dale Andrews
• 2000-01-10: Found n = 60979, Dale Andrews
• 2000-01-10: Found n = 49823, Dale Andrews
• 1999-04-19: Found n = 32295, Dale Andrews