Riesel primes of the form 291•2n-1

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

Current data

k , b : 291 , 2 Type : 3 Count : 47 Nash : 1969 Max n : 2,700,000 Date : 2024-10-04 Reserved : No Prime Left BehindNo Prime Left Behind/Reserved

2, 5, 9, 11, 17, 21, 29, 30, 33, 50, 59, 62, 137, 161, 281, 290, 533, 842, 1410, 1553, 4794, 5529, 5661, 7013, 7470, 19605, 63477, 72513, 152942, 201494, 220562, 236117, 291705, 313433, 372342, 386430, 389225, 531347, 565917, 810347, 832410, 934097, 996371, 1257405, 1534413, 1705173, 1907541

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
• 2013-04-12: Checked to n = 2000000, Thomas Ritschel, released
• 2013-04-04: Found n = 1907541, Michael Curtis
• 2013-03-20: Found n = 1705173, Thomas Ritschel
• 2013-03-15: Found n = 1534413, Thomas Ritschel
• 2013-03-10: Reserved by Thomas Ritschel from n=1300000
• 2012-05-14: Checked to n = 1300000, James P. Burt, released
• 2012-05-07: Found n = 1257405, James P. Burt
• 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 from n=1000000
• 2008-06-19: Found n = 996371, David Metcalfe
• 2008-04-03: Found n = 934097, David Metcalfe
• 2007-12-05: Found n = 832410, David Metcalfe
• 2007-11-23: Found n = 810347, Karsten Bonath
• 2007-03-14: Found n = 565917, David Metcalfe
• 2007-02-04: Found n = 531347, David Metcalfe
• 2006-12-03: Found n = 389225, David Metcalfe
• 2006-12-04: Found n = 386430, Thomas Ritschel
• 2006-11-30: Found n = 372342, Larry Soule
• 2006-11-27: Found n = 313433, J. Craig Brunson
• 2006-11-15: Found n = 291705, David Metcalfe
• 2005-03-20: Found n = 236117, James S. Griffin
• 2005-01-22: Found n = 220562, Steven Harvey
• 2005-01-11: Found n = 201494, Steven Harvey
• 2000-11-22: Found n = 152942, Janusz Szmidt
• 2000-05-17: Found n = 63477, Phil Carmody