Williams primes of the form 26•27n-1

Reserved! This sequence is currently reserved by: Mark Rodenkirch

Current data

Base : 27 Count : 17 Max n : 100,000 Date : 2024-09-22 Reserved : Mark RodenkirchMark Rodenkirch/Reserved

1, 3, 5, 13, 15, 31, 55, 151, 259, 479, 734, 1775, 2078, 6159, 6393, 9013, 33499

Remarks :

Do not add primes here. Only add primes 3*n to Riesel 26•3n-1. For additional history, see above reused Riesel sequence.

History

• 2024-09-22: Checked n = 1 - 100000, Gary Barnes, double-check n = 1 - 25000, released, from Riesel 26•3ⁿ-1
• 2024-08-19: Reserved by Mark Rodenkirch for n = 2 - 100000
• 2018-03-17: Checked n = 1 - 25000, Eric Chen
• ?: Checked to n = 512, Steven Harvey