Riesel primes of the form 3•10n-1

Current data

k , b : 3 , 10 Count : 18 Nash : 3349 Max n : 750,000 Date : 2021-02-19

1, 3, 6, 7, 19, 27, 43, 55, 207, 1311, 3204, 7050, 9439, 26044, 33058, 34507, 49314, 119292

Remarks :

sequence A056703 in OEIS See also Near-repdigit 299...99 Studio Kamada

History

• 2021-02-19: Checked n = 410000 - 750000, Stefano D'Urso
• 2013-10-31: Checked n = 400000 - 410000, Predrag Kurtovic
• 2013-10-25: Checked n = 366000 - 400000, Predrag Kurtovic
• 2013-09-23: Checked n = 230000 - 366000, Predrag Kurtovic
• 2013-09-17: Checked n = 1000000 - 1059700, Serge Batalov
• 2011-04-17: Checked n = 200000 - 230000, Gary Barnes
• 2011-02-20: Checked n = 150000 - 200000, Gary Barnes
• 2011-01-18: Checked n = 100000 - 150000, Gary Barnes
• 2010-12-01: Checked n = 1 - 100000, Gary Barnes, double-check n = 1 - 30000
• 2010-09-30: Checked n = 1 - 30000, Ray Chandler
• 2006-08-07: Found n = 119292, Daniel Heuer
• 2005-02-20: Checked n = 1500 - 3000,  ??
• 2002-02-08: Found n = 49314, Eric J. Sorensen
• 2002-01-04: Found n = 34507, Eric J. Sorensen
• 2000-10-10: Found n = 33058, Harvey Dubner
• 2000-09-10: Found n = 26044, Harvey Dubner
• 2000-08-10: Checked n = 1 - 1500, Robert G. Wilson
• 1993-07: Found n = 9439, Harvey Dubner
• 1993-07: Found n = 7050, Harvey Dubner
• 1989: Found n = 3204, Chris Caldwell, Harvey Dubner
• 1989: Found n = 1311, Chris Caldwell, Harvey Dubner