Williams primes of the form 8•9n+1

Current data

Base : 9 Count : 17 Max n : 625,000 Date : 2020-08-08

1, 4, 5, 11, 26, 29, 38, 65, 166, 490, 641, 2300, 9440, 44741, 65296, 161930, 586240

Remarks :

Do not add primes here. Only add primes 2*n to Proth 8•3n+1. For additional history, see above reused Proth sequence. The sequence A056799 in OEIS

History

• 2020-08-08: Checked n = 600000 - 625000, Paul Vanderveen, from Proth 8•3ⁿ+1
• 2020-05-15: Checked n = 200000 - 380000, Paul Vanderveen
• 2016-02-22: Checked n = 3000 - 200000, Robert Price
• 2012-09-28: Checked n = 1000 - 3000, Vincenzo Librandi
• 2000-08-22: Checked n = 1 - 1000, Robert G. Wilson