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Riesel primes of the form 8•10ⁿ-1

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Current data

`k` , `b` :	8 , 10
Count :	24
Nash :	4046
Max `n` :	1,100,000
Date :	2024-01-30

1, 4, 5, 8^[1], 10, 25, 49, 76, 128, 175, 238, 550, 796, 1219, 2012, 2846, 11336, 21296, 49808, 74318, 236891, 608989, 1715905, 5112847

Remarks :

sequence A056721 in OEIS
See also Near-repdigit 799...99 Studio Kamada

Notes

↑ Woodall 8•10⁸-1

History

2024-01-30: Found n = 5112847, Ryan Propper, Serge Batalov
2020-08-04: Found n = 1715905, Ryan Propper
2017-10-13: Checked to n = 1100000, Predrag Kurtovic
2011-05-25: Found n = 608989, David Broadhurst
2010-11-06: Found n = 236891, David Broadhurst
2004-09-01: Found n = 74318, Eric J. Sorensen
2002-01-03: Found n = 49808, Eric J. Sorensen
2001-09-16: Found n = 21296, Eric J. Sorensen
2000-02-17: Found n = 2846, Ray Ballinger
2000-02-17: Found n = 2012, Ray Ballinger
1994-12-01: Found n = 11336, Harvey Dubner

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