Williams primes of the form 19•20n+1

Reserved! This sequence is currently reserved by: Mark Rodenkirch

Current data

Base : 20 Count : 8 Max n : 100,000 Date : 2024-08-16 Reserved : Mark RodenkirchMark Rodenkirch/Reserved

14, 18, 20, 38, 108, 150, 640, 8244

History

• 2024-08-16: Reserved by Mark Rodenkirch for n = 2 - 100000 double-check
• 2020-11-13: Checked n = 25000 - 100000, Paul Vanderveen
• 2018-03-09: Checked n = 1 - 25000, Eric Chen
• 2016: Checked n = 1 - 1000, Mauro Fiorentini