Riesel primes of the form 149•2n-1

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

Current data

k , b : 149 , 2 Count : 17 Nash : 1022 Max n : 2,400,000 Date : 2024-06-05 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

4, 16, 48, 60, 240, 256, 304, 2644, 3720, 25132, 39472, 212460, 592968, 1054092, 1138804, 1541152, 1945668

History

• 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
• 2015-06-04: Found n = 1945668, Kai Inouye, RPS Megabit Drive 2
• 2013-11-26: Found n = 1541152, Carlos Eduardo Pinho, RPS Megabit Drive 2
• 2011-06-19: Found n = 1138804, David Metcalfe, RPS Megabit Drive 2
• 2011-05-28: Found n = 1054092, 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 from n=1000000
• 2008-10-23: Checked to n = 1000000, Michael Curtis
• 2008-10-22: Checked to n = 1000000, NPLB Drive 4, released
• 2008-09-12: Reserved by Michael Curtis
• 2008-09-09: Reserved by NPLB Drive 4
• 2006-08-13: Checked to n = 600000, RPS Drive 2, released
• 2006-07-29: Found n = 592968, David Metcalfe, RPS Drive 2
• 2006-03-18: 212460 confirmed, Predrag Minovic, RPS Drive 2
• 2006-03-17: Reserved by RPS Drive 2, for n = 210000 - 600000
• 2005-01-10: Checked n = 200000-210000, Steven Harvey, released
• 2004-09-16: Found n = 212460, Shoichiro Yamada
• 2004-05-26: Reserved by Mark Anderson for n ≤ 200000
• 1999-11-22: Found n = 39472, Tom Kuechler
• 1998-08-03: Found n = 25132, Wilfrid Keller