Williams primes of the form 11•10n-1

Current data

Base : 10 Count : 24 Max n : 150,000 Date : 2024-08-26

1, 9, 11, 17, 22, 29, 36, 37, 52, 166, 448, 2011, 3489, 4871, 6982, 10024, 16974, 33287, 47364, 58873, 126160, 234424, 382881, 524706

Remarks :

The sequence A111391 in OEIS See history at Studio Kamada k*10^n-1 form and difficulty 11*10^w-1.

History

• 2024-08-26: Checked n = 2 - 100000, Mark Rodenkirch, double-check, released
• 2024-08-22: Reserved by Mark Rodenkirch for n = 2 - 100000, double-check
• 2021-09-30: Found n = 524706, Stefano D'Urso
• 2021-02-19: Found n = 382881, Stefano D'Urso
• 2020-10-30: Found n = 234424, Stefano D'Urso
• 2013-09-16: Checked to n = 50000?, Ray Chandler
• 2013-09-13: Found n = 126160, Predrag Kurtovic
• 2013-09-13: Found n = 58873, Predrag Kurtovic
• 2011-03-15: Found n = 47364, Ray Chandler
• 2011-03-02: Found n = 33287, Ray Chandler
• 2010-11-15: Found n = 16974, Ray Chandler
• 2010-10-15: Found n = 10024, Ray Chandler
• 2005-11-15: Checked n = 1 - 9500, Robert G. Wilson