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 : 48 Nash : 1969 Max n : 2,800,000 Date : 2024-11-13 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, 2071142

History

• 2024-04-26: Found n = 2071142, 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
• 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
• 2008-07-04: Checked to n = 1000000, RPS Drive 5, released
• 2008-06-19: Found n = 996371, David Metcalfe, RPS Drive 5
• 2008-04-03: Found n = 934097, David Metcalfe, RPS Drive 5
• 2007-12-05: Found n = 832410, David Metcalfe, RPS Drive 5
• 2007-11-23: Found n = 810347, Karsten Bonath, RPS Drive 5
• 2007-03-14: Found n = 565917, David Metcalfe, RPS Drive 5
• 2007-02-04: Found n = 531347, David Metcalfe, RPS Drive 5
• 2006-12-03: Found n = 389225, David Metcalfe, RPS Drive 5
• 2006-12-04: Found n = 386430, Thomas Ritschel, RPS Drive 5
• 2006-11-30: Found n = 372342, Larry Soule, RPS Drive 5
• 2006-11-27: Found n = 313433, J. Craig Brunson, RPS Drive 5
• 2006-11-15: Found n = 291705, David Metcalfe, RPS Drive 5
• 2006-11-12: Reserved by RPS Drive 5, for n > 260000
• 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