Riesel primes of the form 237•2n-1

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

Current data

k , b : 237 , 2 Type : 3 Count : 53 Nash : 2404 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 5, 9, 13, 17, 18, 25, 26, 30, 38, 69, 88, 89, 94, 133, 198, 205, 289, 360, 402, 438, 445, 498, 637, 914, 934, 973, 1265, 2965, 3813, 6096, 11560, 13977, 19816, 33673, 43128, 47869, 50370, 70649, 72809, 82453, 84904, 89210, 102618, 109334, 181610, 421862, 729654, 832053, 1366717, 1371630, 1503376, 1512216

History

• 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
• 2013-02-24: Checked to n = 2000000, Peter Benson, released
• 2013-02-16: Found n = 1512216, Peter Benson
• 2013-02-16: Found n = 1503376, Peter Benson
• 2013-02-16: Found n = 1371630, Peter Benson
• 2013-02-16: Found n = 1366717, Peter Benson
• 2013-02-15: Reserved by Peter Benson 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
• 2007-12-02: Found n = 832053, David Metcalfe, RPS Drive 5
• 2007-08-26: Found n = 729654, David Metcalfe, RPS Drive 5
• 2006-12-13: Found n = 421862, Larry Soule, RPS Drive 5
• 2006-11-12: Reserved by RPS Drive 5, for n > 260000
• 2006-03-05: Reservation dropped, Wilfrid Keller
• 2005-01-16: Reserved by Wilfrid Keller
• 2005-01-10: Checked n = 200000 - 210000, Steven Harvey
• 2004-05-01: Checked to n = 200000, Thomas Masser, released
• 2004-04-27: Found n = 181610, Thomas Masser
• 2004-04-15: Reserved by Thomas Masser
• 2000-05-15: Found n = 50370, Phil Carmody
• 2000-05-15: Found n = 47869, Phil Carmody
• 2000-05-05: Found n = 43128, Phil Carmody