Riesel primes of the form 99•10n-1

Current data

k , b : 99 , 10 Count : 22 Nash : 3307 Max n : 400,000 Date : 2021-10-05

3, 4, 5, 9, 19, 25, 34, 70, 82, 718, 2035, 2494, 3369, 3953, 4219, 8524, 30943, 49375, 52082, 139670, 303255, 1536527

Remarks :

The sequence A257041 in OEIS See also Near-repdigit 989...99 Studio Kamada See also Williams 99•100n-1

History

• 2021-10-05: Checked n = 1040001 - 1050000, Predrag Kurtovic
• 2021-01-10: Checked n = 1030001 - 1040000, Predrag Kurtovic
• 2019-02-15: Found n = 1536527, Ryan Propper, Serge Batalov
• 2019-01-29: Checked n = 1020001 - 1030000, Predrag Kurtovic
• 2017-11-08: Checked n = 1015001 - 1020000, Predrag Kurtovic
• 2017-06-12: Checked n = 1010001 - 1015000, Predrag Kurtovic
• 2016-09-25: Checked n = 1000001 - 1010000, Predrag Kurtovic
• 2015-05-05: Checked n = 280000 - 400000, Predrag Kurtovic
• 2015-04-30: Found n = 303255, Predrag Kurtovic
• 2013-10-09: Checked n = 230000 - 280000, Predrag Kurtovic
• 2011-04-17: Checked n = 200000 - 230000, Gary Barnes double-check n = 200000 - 219321
• 2011-02-20: Checked n = 150000 - 200000, Gary Barnes double-check
• 2011-01-18: Checked n = 100000 - 150000, Gary Barnes double-check
• 2010-12-12: Checked n = 11000 - 20000, Ray Chandler
• 2010-12-01: Checked n = 1 - 100000, Gary Barnes, double-check
• 2010-10-15: Checked n = 1 - 11000, Ray Chandler
• 2007-11-08: Checked n = 1 - 219321, Larry Soule
• 2006-09-06: Found n = 139670, Larry Soule
• 2004-08-25: Found n = 52082, Eric J. Sorensen
• 2004-06-30: Found n = 49375, Eric J. Sorensen
• 2002-03-18: Found n = 30943, Eric J. Sorensen