Riesel primes of the form 67•2n-1

Current data

k , b : 67 , 2 Type : Low Count : 20 Nash : 829 Max n : 3,500,000 Date : 2021-03-21

5, 9, 21, 45, 65, 77, 273, 677, 1049, 1721, 17105, 18645, 27761, 61661, 79773, 403461, 527037, 722805, 2215581, 3391385

History

• 2021-03-21: Checked n = 1 - 1000000, Gary Barnes, double check, results included
• 2014-09-15: none, David Metcalfe, released
• 2014-04-04: Checked n = 3440000 - 3500000, David Metcalfe
• 2014-02-28: Checked n = 3380000 - 3440000, David Metcalfe
• 2014-02-04: Found n = 3391385, David Metcalfe
• 2014-01-31: Checked n = 2960000 - 3380000, David Metcalfe
• 2013-11-01: Checked n = 2670000 - 2960000, David Metcalfe
• 2013-10-31: Checked n = 2400000 - 2670000, David Metcalfe
• 2012-01-31: Checked n = 2380000 - 2400000, David Metcalfe
• 2011-12-31: Checked n = 2350000 - 2380000, David Metcalfe
• 2011-12-01: Checked n = 2300000 - 2350000, David Metcalfe
• 2010-08-01: Checked n = 2270000 - 2300000, David Metcalfe
• 2010-06-30: Checked n = 2180000 - 2270000, David Metcalfe
• 2010-06-04: Found n = 2215581, David Metcalfe
• 2010-04-30: Checked n = 2040000 - 2180000, David Metcalfe
• 2009-03-14: Checked n = 1980000 - 2040000, David Metcalfe
• 2009-01-28: Checked n = 1760000 - 1980000, David Metcalfe
• 2009-01-10: Checked n = 1015000 - 1760000, David Metcalfe
• 2009-01-09: Checked n = 950000 - 984092, 1652109 - 1667801, Peter Benson
• 2008-09-11: Reserved by Carlos Eduardo Pinho
• 2008-02-12: Checked n = 886000 - 1015000, David Metcalfe
• 2008-01-18: Checked n = 610000 - 886000, David Metcalfe
• 2008-01-02: Found n = 722805, David Metcalfe
• 2007-12-01: Checked n = 400000? - 610000, David Metcalfe
• 2007-11-25: Found n = 527037, David Metcalfe
• 2007-11-05: Reserved by David Metcalfe
• 2006-03-23: Checked n = 100000 - 200000, Thomas Ritschel, double-check
• 2006-02-06: Checked n = 100000 - 110000, Thomas Ritschel, double-check
• 2005-11-09: Found n = 403461, Maksym Voznyy
• 2004-12-04: Checked n = 210000 - 400000, Predrag Minovic
• 2004-08-01: Checked n = 200000 - 210000, Steven Harvey, released
• 2004-07-26: Reserved by Steven Harvey for n = 200000 - 210000
• 2000-04-17: Found n = 61661, Tom Kuechler
• 1998-08-04: Found n = 27761, Wilfrid Keller
• 1998-08-04: Found n = 18645, Wilfrid Keller
• 1998-08-03: Found n = 17105, Wilfrid Keller