Currently there may be errors shown on top of a page, because of a missing Wiki update (PHP version and extension DPL3).

Navigation

Topics

Help • Register • News • History • How to • Sequences statistics • Template prototypes

Riesel primes of the form 9•10ⁿ-1

From Prime-Wiki

Revision as of 10:35, 30 August 2024 by Gd barnes (talk | contribs) (add some history from Williams prime page)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Jump to: navigation, search

Current data

`k` , `b` :	9 , 10
Count :	22
Nash :	3518
Max `n` :	230,000
Date :	2021-10-05

1^[1], 3^[2], 7, 19, 29, 37, 93, 935, 8415, 9631, 11143, 41475, 41917, 48051, 107663, 212903, 223871, 260253, 364521, 383643, 1009567, 1762063

Remarks :

The sequence A056725 in OEIS
See also Near-repdigit 899...99 Studio Kamada
See also Williams 9•10ⁿ-1

Notes

↑ Sophie Germain n=1
↑ Twin n=3

History

2021-10-05: Checked n = 1030007 - 1050000, Predrag Kurtovic
2020-08-04: Found n = 1762063, Ryan Propper
2019-01-29: Checked n = 1000000 - 1030007, Predrag Kurtovic
2016-09-19: Found n = 1009567, Predrag Kurtovic
2011-04-17: Checked n = 1 - 230000, Gary Barnes
2011-01-07: Found n = 383643, David Broadhurst
2010-12-19: Found n = 364521, David Broadhurst
2010-11-09: Found n = 223871, David Broadhurst
2010-11-05: Found n = 260253, David Broadhurst
2010-11-04: Found n = 212903, David Broadhurst
2006-10-30: Checked to n = 5000, Hugo Platzer
2004-01-21: Found n = 107663, Jiong Sun
2002-01-23: Found n = 41917, Eric J. Sorensen
2000-12-10: Found n = 48051, Harvey Dubner
2000-10-27: Found n = 41475, Dirk Augustin
1994-12-01: Found n = 11143, Harvey Dubner
1994-10-01: Found n = 9631, Harvey Dubner
1994-10-01: Found n = 8415, Harvey Dubner
?: Found n = 935, Robert G. Wilson

Retrieved from "https://www.rieselprime.de/z/index.php?title=Riesel_prime_10_9&oldid=34397"