Riesel primes of the form 7•2n-1

Current data

k , b : 7 , 2 Type : Low Count : 21 Nash : 912 Max n : 5,000,000 Date : 2021-06-17

1, 5, 9, 17, 21, 29, 45, 177, 18381, 22529, 24557, 26109, 34857, 41957, 67421, 70209, 169085, 173489, 177977, 363929, 372897

Remarks :

The sequence A001771 in OEIS

History

• 2021-06-17: Checked to n = 5000000, Gary Barnes, released, double-check for n=1000000-4230000, results included
• 2021-05-10: Reserved by Gary Barnes
• 2014-10-05: Checked to n = 4230000, Predrag Minovic
• 2013-09-08: Checked to n = 3750000, Predrag Minovic
• 2013-07-09: Checked to n = 3650000, Predrag Minovic
• 2013-01-04: Checked to n = 3260000, Predrag Minovic
• 2012-07-02: Checked to n = 3130000, Predrag Minovic
• 2012-05-04: Checked to n = 3110000, Predrag Minovic
• 2012-03-04: Checked to n = 3060000, Predrag Minovic
• 2011-12-31: Checked to n = 3024000, Predrag Minovic
• 2011-06-04: Checked to n = 2770000, Predrag Minovic
• 2011-04-12: Checked to n = 2730000, Predrag Minovic
• 2011-03-05: Checked to n = 2710000, Predrag Minovic
• 2011-01-13: Checked to n = 2670000, Predrag Minovic
• 2010-09-05: Checked to n = 2600000, Predrag Minovic
• 2010-07-18: Checked to n = 2580000, Predrag Minovic
• 2010-06-05: Checked to n = 2550000, Predrag Minovic
• 2010-05-04: Checked to n = 2530000, Predrag Minovic
• 2010-04-11: Checked to n = 2510000, Predrag Minovic
• 2010-01-17: Checked to n = 2500000, Predrag Minovic
• 2009-11-03: Checked to n = 2450000, Predrag Minovic
• 2009-08-09: Checked to n = 2300000, Predrag Minovic
• 2009-04-04: Checked to n = 2250000, Predrag Minovic
• 2009-01-10: Reserved by Predrag Minovic, range n=2210000-2366000
• 2008-02-24: Checked to n = 2070000, Predrag Minovic
• 2004-05-09: Found n = 372897, Predrag Minovic
• 2004-04-30: Found n = 363929, Predrag Minovic
• 2000-02-07: Found n = 177977, Ingo Buechel, Wilfrid Keller
• 2000-01-01: Found n = 173489, Ingo Buechel, Wilfrid Keller
• 1999-12-01: Found n = 169085, Ingo Buechel, Wilfrid Keller
• 1998-12-26: Found n = 70209, Ingo Buechel, Wilfrid Keller
• 1998-12-23: Found n = 67421, Ingo Buechel, Wilfrid Keller
• 1998-08-31: Found n = 41957, Wilfrid Keller
• 1998-07-28: Found n = 34857, Wilfrid Keller
• 1998-06-14: Found n = 26109, Wilfrid Keller
• 1998-06-14: Found n = 24557, Wilfrid Keller
• 1998-06-14: Found n = 22529, Wilfrid Keller
• 1998-04-09: Found n = 18381, Ray Ballinger