Riesel primes of the form 41•2n-1

Current data

k , b : 41 , 2 Count : 23 Nash : 1174 Max n : 4,500,000 Date : 2021-03-21

2, 10, 14, 18, 50, 114, 122, 294, 362, 554, 582, 638, 758, 3334, 6630, 42450, 64218, 89282, 149238, 511718, 1018778, 1059562, 2872058

Remarks :

The sequence A050546 in OEIS

History

• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2014-03-06: Checked n = 4000000 - 4500000, Serge Batalov, released
• 2014-03-04: Checked n = 3000000 - 4000000, Serge Batalov
• 2014-03-01: Reserved by Serge Batalov for n = 3000000 - 4000000
• 2013-07-01: Checked n = 2100000 - 3000000, Thomas Ritschel, released
• 2013-06-22: Found n = 2872058, Thomas Ritschel
• 2013-04-23: Checked n = 2000000 - 2100000, Thomas Ritschel
• 2013-01-31: Checked n = 1700000 - 2000000, Thomas Ritschel
• 2012-12-28: Reserved by Thomas Ritschel from n = 1700000
• 2010-08-09: Checked n = 1350000 - 1652000, Michael Curtis, released, n = 1652054 - 1702642 previously completed by Peter Benson
• 2010-03-21: Checked n = 1220000 - 1350000, Michael Curtis
• 2010-01-12: Checked n = 1160000 - 1220000, Michael Curtis
• 2009-10-14: Checked n = 1010000 - 1050000, 1150000 - 1160000, Michael Curtis
• 2009-09-08: Found n = 1018778, Michael Curtis
• 2009-08-31: Checked n = 1000000 - 1010000, 1050000 - 1150000, Michael Curtis
• 2009-03-15: Found n = 1059562, Michael Curtis
• 2009-02-12: none, Michael Curtis
• 2009-01-09: Checked n = 950000 - 1004461, 1140042 - 1149414, 1652054 - 1702642, 1967610 - 1979742, Peter Benson
• 2008-10-23: Reserved by Michael Curtis to n = 1700000
• 2008-07-07: Checked n = 965000 - 1000000, Gary Barnes released
• 2008-05-25: Checked n = 705000 - 965000, Gary Barnes
• 2008-02-01: Checked n = 618000 - 705000, Gary Barnes
• 2008-01-14: Checked n = 600000 - 618000, Gary Barnes
• 2008-01-10: Checked n = 585000 - 600000, Gary Barnes
• 2007-12-29: Reserved by Gary Barnes for n = 585000 - 800000
• 2007-12-29: none, Jeffrey Sax, released
• 2007-07-30: Checked n = 500000 - 585000, Jeffrey Sax, see Riesellist 2007-07-30
• 2007-04-18: Found n = 511718, Jeffrey Sax
• 2007-04-07: Reserved by Jeffrey Sax
• 2004-07-01: Checked n = 480000 - 500000, Thomas Ritschel, released
• 2004-06-18: Checked n = 390000 - 480000, Thomas Ritschel
• 2004-05-26: Checked n = 300000 - 390000, Thomas Ritschel
• 2004-05-11: Checked n = 1 - 300000, Thomas Ritschel
• 2004-04-28: Reserved by Thomas Ritschel
• 2000-06-29: Found n = 64218, Tom Kuechler
• 1999-12-27: Found n = 42450, Tom Kuechler