Riesel primes of the form 153•2n-1

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

Current data

k , b : 153 , 2 Type : 3 Count : 62 Nash : 3189 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

3, 4, 6, 7, 10, 11, 12, 19, 20, 22, 23, 39, 66, 106, 120, 124, 151, 312, 411, 447, 474, 507, 574, 671, 787, 826, 979, 1690, 1954, 2047, 3003, 4323, 4426, 5903, 6267, 6846, 14550, 17470, 21520, 31711, 36724, 45291, 45654, 51778, 55420, 63439, 68451, 78423, 109696, 125128, 130710, 169836, 192900, 195028, 383083, 545716, 800567, 894504, 1215327, 1245154, 2522271, 2581916

History

• 2024-08-17: Found n = 2581916, Gary Barnes, NPLB K300 Drive 1
• 2024-07-14: Found n = 2522271, 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
• 2011-07-24: Found n = 1245154, David Metcalfe, RPS Megabit Drive 2
• 2011-07-13: Found n = 1215327, Larry Soule, RPS Megabit Drive 2
• 2011-04-28: Reserved by RPS Megabit Drive 2 for n > 1000000
• 2009-09-14: Checked n = 700000 - 1000000, RPS Drive 9ks, released
• 2009-06-12: Found n = 894504, Carlos Eduardo Pinho, RPS Drive 9ks
• 2009-01-15: Found n = 800567, Predrag Minovic, RPS Drive 9ks
• 2007-12-03: Reserved by RPS Drive 9ks for n = 700000 - 1000000
• 2007-02-02: Checked to n = 700000, Thomas Masser, released
• 2005-10-05: Checked to n = 700000, Thomas Masser
• 2005-05-11: Found n = 545716, Thomas Masser
• 2005-03-13: Found n = 383083, Thomas Masser
• 2005-01-10: Checked n = 200000 - 210000, Steven Harvey, released
• 2005-01-06: Checked to n = 300000, Thomas Masser
• 2005-01-04: Checked n = 200000 - 300000, Thomas Masser
• 2004-06-18: Checked to n = 250000, Thomas Ritschel, released
• 2004-06-06: Found n = 195028, Thomas Ritschel
• 2004-06-06: Found n = 192900, Thomas Ritschel
• 2004-06-02: Found n = 169836, Thomas Ritschel
• 2004-05-26: Reserved by Thomas Ritschel
• 2000-04-28: Found n = 78423, Bouk de Water
• 2000-01-16: Found n = 68451, Bouk de Water
• 2000-01-12: Found n = 63439, Bouk de Water
• 1999-12-14: Found n = 55420, Bouk de Water
• 1999-11-30: Found n = 51778, Bouk de Water
• 1999-11-21: Found n = 45654, Bouk de Water
• 1999-11-21: Found n = 45291, Bouk de Water