Riesel primes of the form 185•2n-1

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

Current data

k , b : 185 , 2 Count : 36 Nash : 2161 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 6, 10, 18, 26, 40, 46, 78, 230, 542, 1286, 1550, 1728, 2138, 2226, 2686, 3742, 5002, 12730, 42936, 64290, 86602, 86686, 109346, 113966, 133346, 211876, 229850, 238230, 294662, 391322, 459352, 612412, 1234730, 2127966, 2264906

History

• 2024-05-16: Reserved by NPLB K300 Drive 1 for n > 2300000
• 2022-04-10: Checked to n = 2300000, RPS Megabit Drive 2
• 2022-04-10: Found n = 2264906, Thomas Ritschel, 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
• 2019-04-15: Found n = 2127966, David Metcalfe, RPS Megabit Drive 2
• 2011-07-20: Found n = 1234730, David Metcalfe, RPS Megabit Drive 2
• 2011-04-28: Reserved by RPS Megabit Drive 2 for n > 1000000
• 2009-07-30: Reserved by Borys Jaworski for sieving only n=1000000-5000000
• 2008-10-22: Checked to n = 1000000, NPLB Drive 4, released
• 2008-10-21: Checked to n = 1000000, David Metcalfe
• 2008-09-11: Reserved by David Metcalfe
• 2008-09-11: Found n = 612412, Carlos Eduardo Pinho, NPLB Drive 4
• 2008-09-09: Reserved by NPLB Drive 4
• 2006-08-13: Checked to n = 600000, RPS Drive 2, released
• 2006-05-21: Found n = 459352, Predrag Minovic, RPS Drive 2
• 2006-04-26: Found n = 391322, Predrag Minovic, RPS Drive 2
• 2006-04-03: Found n = 294662, Larry Soule, RPS Drive 2
• 2006-03-29: Found n = 229850, Alexandre de Pereyra, RPS Drive 2
• 2006-03-21: Found n = 238230, David Metcalfe, RPS Drive 2
• 2006-03-17: Reserved by RPS Drive 2, for n = 210000 - 600000
• 2006-02-06: Checked n = 100000 - 128100, Thomas Ritschel, double-check
• 2005-01-12: Checked to n = 210000, Steven Harvey, released
• 2004-08-16: Checked to n = 200000, Steven Harvey
• 2004-08-12: Reserved by Steven Harvey for n ≤ 200000