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Riesel primes of the form 3•10n-1
Current data
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Remarks : |
sequence A056703 in OEIS See also Near-repdigit 299...99 Studio Kamada |
Notes
- ↑ Sophie Germain n=1, Twin n=1
- ↑ Twin n=3, Woodall 3•103-1
- ↑ Woodall 3•1003-1
- ↑ Sophie Germain n=7, Twin n=7
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
