Riesel primes of the form 289•2n-1

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

Current data

k , b : 289 , 2 Count : 34 Nash : 1642 Max n : 2,800,000 Date : 2024-11-13 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

1, 3, 13, 21, 25, 33, 73, 93, 115, 127, 397, 1255, 3751, 3801, 4771, 8997, 10063, 11253, 18663, 27525, 28009, 34041, 55693, 60243, 67891, 77391, 90201, 501991, 509401, 610737, 728205, 1098117, 1587151, 2118129

History

• 2024-05-01: Found n = 2118129, Göran Schmidt, 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
• 2011-12-24: Checked to n = 2000000, Peter Benson, released
• 2011-11-28: Found n = 1587151, Peter Benson
• 2011-10-31: Reserved by Peter Benson from n=1000000
• 2009-09-14: Checked to n = 1000000, Gary Barnes, released
• 2009-09-02: Checked to n = 900000, Gary Barnes
• 2009-08-21: Reserved by Gary Barnes
• 2009-01-23: Checked to n = 800000, Gary Barnes, released
• 2009-01-01: Checked to n = 760000, Gary Barnes
• 2008-12-24: Checked to n = 700000, Gary Barnes
• 2008-10-22: Checked to n = 680000, NPLB Drive 4, released
• 2008-09-09: Reserved by NPLB Drive 4
• 2008-09-08: Checked to n = 600000, Gary Barnes
• 2007-07-18: Checked to n = 520000, Gary Barnes
• 2007-07-15: Checked to n = 503000, Gary Barnes
• 2007-07-14: Checked to n = 485000, Gary Barnes
• 2007-07-11: Checked n = 260000 - 470000, Gary Barnes
• 2006-09-16: Found n = 1098117, Bo Xiao
• 2005-05-25: Found n = 728205, Bo Xiao
• 2005-03-04: Found n = 610737, Bo Xiao
• 2005-01-25: Found n = 509401, Bo Xiao
• 2005-01-14: Found n = 501991, Bo Xiao
• 2004-11-28: Checked to n = 300000, Jeffrey Sax, released
• 2000-05-15: Found n = 60243, Phil Carmody
• 2000-05-01: Found n = 55693, Phil Carmody