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Riesel primes of the form 271•2ⁿ-1

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Reserved! This sequence is currently reserved by: Thomas Ritschel

Current data

`k` , `b` :	271 , 2
Count :	24
Nash :	1510
Max `n` :	5,000,000
Date :	2019-12-17
Reserved :	Thomas RitschelThomas Ritschel/Reserved

1, 7, 21, 55, 175, 235, 2289, 12419, 19917, 19971, 21979, 54007, 66241, 68757, 98595, 241211, 274509, 322971, 342349, 470529, 786059, 1004527, 2223601, 3079189

History

2019-12-17: Checked to n = 5000000, Thomas Ritschel
2019-09-28: Checked to n = 4000000, Thomas Ritschel
2018-11-19: Found n = 3079189, Thomas Ritschel
2018-08-31: Found n = 2223601, Thomas Ritschel
2018-06-18: Reserved by Thomas Ritschel, from n=2000000
2013-03-10: Checked to n = 2000000, Thomas Ritschel, released
2013-02-12: Reserved by Thomas Ritschel from n=1300000
2012-05-14: Checked to n = 1300000, James P. Burt, released
2011-12-31: Checked to n = 1100000, James P. Burt
2011-12-10: Reserved by James P. Burt from n=1000000
2011-12-05: Found n = 1004527, James P. Burt
2009-07-30: Reserved by Borys Jaworski from n=1000000
2008-09-26: Found n = 786059, Max Dettweiler
2008-09-09: Reserved by NPLB Drive 4
2006-09-06: Found n = 470529, Predrag Minovic
2006-08-08: Found n = 342349, David Metcalfe
2006-08-07: Found n = 322971, Larry Soule
2006-07-30: Found n = 274509, Larry Soule
2005-04-04: Found n = 241211, James S. Griffin
1998-12-09: Found n = 21979, Wilfrid Keller

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