Riesel primes of the form 21405•2n-1

Reserved! This sequence is currently reserved by: Alexander Jones

Current data

k , b : 21405 , 2 Type : 315 Count : 54 Nash : 3703 Max n : 150,000 Date : 2023-02-01 Reserved : Alexander JonesAlexander Jones/Reserved

2, 9, 21, 27, 28, 30, 33, 53, 54, 74, 76, 92, 108, 120, 242, 250, 252, 339, 416, 459, 514, 652, 660, 800, 810, 849, 1582, 1613, 1771, 2116, 2402, 2610, 3460, 3779, 5771, 5980, 6402, 6780, 7533, 7582, 14592, 14827, 16046, 18737, 18900, 21196, 23392, 34678, 35494, 36508, 47118, 77321, 87796, 214221

History

• 2023-02-01: Checked to n = 150000, Alexander Jones
• 2023-01-29: Checked to n = 100000, Alexander Jones
• 2023-01-29: Reserved by Alexander Jones
• 2005-11-28: Found n = 214221, Bernardo Boncompagni