Riesel primes of the form 81•2n-1

Reserved! This sequence is currently reserved by: William Byerly

Current data

k , b : 81 , 2 Type : 3 Count : 37 Nash : 1698 Max n : 2,031,000 Date : 2022-01-10 Reserved : William ByerlyWilliam Byerly/Reserved

3, 5, 11, 17, 21, 27, 81, 101, 107, 327, 383, 387, 941, 1665, 3515, 4007, 4727, 7137, 16257, 16833, 21243, 24239, 35435, 59925, 91673, 153455, 165341, 183167, 190349, 240743, 253385, 308325, 741917, 1335675, 2375447, 2797443, 3174353

History

• 2022-01-10: Found n = 3174353, William Byerly
• 2021-11-19: Found n = 2797443, William Byerly
• 2021-11-10: Found n = 2375447, William Byerly
• 2021-10-21: Reserved by William Byerly
• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2013-12-15: Checked to n = 2031000, Michael Kwok, released
• 2013-09-12: Checked to n = 2031000, Michael Kwok, results included
• 2013-08-01: Reserved by Michael Kwok
• 2012-05-10: Checked to n = 2000000, David Metcalfe, released
• 2012-04-30: Checked to n = 1960000, David Metcalfe
• 2012-03-31: Checked to n = 1800000, David Metcalfe
• 2012-02-29: Checked to n = 1670000, David Metcalfe
• 2012-01-31: Checked to n = 1610000, David Metcalfe
• 2011-12-31: Checked to n = 1520000, David Metcalfe
• 2011-12-01: Checked to n = 1430000, David Metcalfe
• 2011-10-31: Reserved by David Metcalfe
• 2009-01-10: Checked n = 1600000 - 1655000, David Metcalfe
• 2008-12-09: Checked to n = 1340000, David Metcalfe
• 2008-09-11: Reserved by Carlos Eduardo Pinho
• 2008-06-10: Found n = 1335675, David Metcalfe
• 2008-02-12: Checked to n = 1200000, David Metcalfe
• 2008-01-18: Checked to n = 1150000, David Metcalfe
• 2007-12-01: Checked to n = 1060000, David Metcalfe
• 2007-11-05: Checked to n = 1025000, David Metcalfe
• 2007-08-18: Checked to n = 900000, David Metcalfe
• 2007-07-16: Checked to n = 840000, David Metcalfe
• 2007-05-30: Found n = 741917, David Metcalfe
• 2006-04-13: Found n = 308325, Chris Chatfield
• 2006-04-07: Found n = 253385, Chris Chatfield
• 2006-04-06: Found n = 240743, Chris Chatfield
• 2004-05-10: Found n = 190349, Harsh Aggarwal
• 2004-05-10: Found n = 183167, Harsh Aggarwal
• 2004-05-10: Found n = 165341, Harsh Aggarwal
• 1999-01-13: Found n = 35435, Tom Kuechler
• 1999-01-07: Found n = 24239, Tom Kuechler
• 1994: Found n = 7137, Harvey Dubner