Riesel primes of the form 249•2n-1

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

Current data

k , b : 249 , 2 Type : 3 Count : 24 Nash : 1592 Max n : 2,700,000 Date : 2024-10-04 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

8, 9, 12, 41, 57, 156, 201, 249, 612, 956, 1617, 2064, 2091, 2547, 4512, 5696, 9608, 11444, 20556, 33896, 77079, 89004, 251036, 2001627

History

• 2024-04-23: 2001627 confirmed, Gary Barnes, NPLB K300 Drive 1
• 2024-04-23: Reserved by NPLB K300 Drive 1 for n > 2000000
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2020-03-13: Checked to n = 2000000, Michael Curtis, released
• 2015-02-19: Found n = 2001627, Michael Curtis
• 2015-02-18: Reserved by Michael Curtis from n=2000000
• 2013-03-30: Checked to n = 2000000, David Metcalfe, released
• 2013-02-02: Reserved by David Metcalfe from n=1300000
• 2012-05-14: Checked to n = 1300000, James P. Burt, released
• 2011-12-31: Checked to n = 1100000, James P. Burt
• 2011-12-10: Reserved by James P. Burt from n=1000000
• 2009-07-30: Reserved by Borys Jaworski for sieving only n=1000000-5000000
• 2008-07-04: Checked to n = 1000000, RPS Drive 5, released
• 2006-11-12: Reserved by RPS Drive 5, for n > 260000
• 2005-11-26: Found n = 251036, Jun Tajima
• 2004-11-05: Checked n = 200000 - 230000, Steven Harvey, released