Riesel primes of the form 91•2n-1

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

Current data

k , b : 91 , 2 Count : 52 Nash : 2374 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 3, 9, 13, 15, 17, 19, 23, 47, 57, 67, 73, 77, 81, 83, 191, 301, 321, 435, 867, 869, 917, 6009, 6051, 8077, 9003, 10355, 10719, 11217, 20197, 22011, 36379, 45373, 53441, 77013, 86329, 89853, 90341, 104783, 169779, 187407, 245989, 313849, 535819, 563469, 633169, 711335, 787173, 1026521, 1742093, 2407249, 2494467

History

• 2024-06-30: Found n = 2494467, Gary Barnes, NPLB K300 Drive 1
• 2024-06-11: Found n = 2407249, Florian Piesker, 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
• 2013-01-12: Checked to n = 2000000, James P. Burt
• 2012-05-31: Checked to n = 1830000, James P. Burt
• 2012-05-19: Found n = 1742093, James P. Burt
• 2011-12-10: Checked to n = 1600000, James P. Burt
• 2011-05-07: Checked to n = 1300000, James P. Burt
• 2011-04-25: Reserved by James P. Burt
• 2010-02-11: Checked to n = 1120000, Predrag Minovic, released
• 2009-07-30: Reserved by Borys Jaworski for sieving only n=1120000-5000000
• 2009-07-26: Checked n = 1070000 - 1113000, (unknown), See range done at RPS other completed ranges.
• 2009-01-10: Reserved by Predrag Minovic, for n=1030000-1070000
• 2009-01-09: Checked n = 950000 - 971406, Peter Benson
• 2008-12-25: Found n = 1026521, Predrag Minovic
• 2008-02-24: Checked to n = 780000, Predrag Minovic
• 2008-02-19: Found n = 787173, Predrag Minovic
• 2007-10-15: Found n = 711335, Predrag Minovic
• 2007-09-02: Found n = 633169, Ed Goforth, Predrag Minovic
• 2007-06-08: Reserved by Predrag Minovic for n ≤ 1120000
• 2006-12-16: Checked to n = 600000, RPS Drive 4, released
• 2006-11-02: Found n = 563469, Predrag Minovic, RPS Drive 4
• 2006-10-10: Found n = 535819, Predrag Minovic, RPS Drive 4
• 2006-08-07: Found n = 313849, Thomas Ritschel, RPS Drive 4
• 2006-07-28: Reserved by RPS Drive 4, for n = 300000 - 600000
• 2005-01-31: Checked to n = 300000, Steven Harvey, released
• 2005-01-25: Found n = 245989, Steven Harvey
• 2005-01-22: Reserved by Steven Harvey, for n=210000-300000
• 2005-01-04: Checked to n = 210000, Steven Harvey
• 2004-06-30: Checked n = 40000 - 200000, Steven Harvey, released
• 2004-06-29: Found n = 187407, Steven Harvey
• 2004-06-28: Found n = 169779, Steven Harvey
• 2004-06-24: Reserved by Steven Harvey for n≤200000
• 1999-09-07: Found n = 45373, Tom Kuechler
• 1999-04-01: Found n = 36379, Tom Kuechler