Williams primes of the form 21•20n-1

Current data

Base : 20 Count : 22 Max n : 100,000 Date : 2024-09-09

1, 10, 26, 30, 33, 73, 80, 120, 282, 331, 662, 859, 2976, 3106, 6645, 9674, 10459, 14062, 15751, 42558, 60173, 98104

History

• 2024-09-09: Checked n = 2 - 100000, Mark Rodenkirch, double-check n = 2 - 25000, released
• 2024-08-16: Reserved by Mark Rodenkirch for n = 2 - 100000
• 2018-03-09: Checked n = 1 - 25000, Eric Chen
• 2016: Checked n = 1 - 1000, Mauro Fiorentini