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Riesel primes of the form 193•2ⁿ-1

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Reserved! This sequence is currently reserved by: Tanel Liiv

Current data

`k` , `b` :	193 , 2
Type :	Low
Count :	18
Nash :	760
Max `n` :	5,000,000
Date :	2021-10-01
Reserved :	Tanel LiivTanel Liiv/Reserved

3, 15, 27, 63, 87, 135, 543, 1383, 1455, 7767, 18543, 22143, 40967, 198719, 405483, 439107, 880287, 1268399

History

2021-10-01: Checked to n = 5000000, Tanel Liiv
2021-02-02: Checked to n = 4600000, Tanel Liiv
2020-09-21: Checked to n = 4200000, Tanel Liiv
2020-06-11: Checked to n = 3700000, Tanel Liiv
2020-03-22: Checked to n = 3000000, Tanel Liiv
2020-03-13: Reserved by Tanel Liiv from n=2200000
2019-08-18: Checked to n = 2200000, RPS 2nd Megabit Drive
2011-08-05: Found n = 1268399, David Metcalfe
2009-11-20: Checked to n = 1000000, Predrag Minovic, released
2009-06-23: Checked to n = 950000, Predrag Minovic
2009-02-13: Checked to n = 920000, Predrag Minovic
2008-02-24: Checked to n = 885000, Predrag Minovic
2008-01-17: Found n = 880287, Predrag Minovic
2005-12-25: Found n = 439107, Predrag Minovic
2005-12-25: Found n = 405483, Predrag Minovic
2004-06-11: Found n = 198719, Thomas Masser
1999-11-11: Found n = 40967, Tom Kuechler

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