Riesel primes of the form 16921•2n-1

Current data

k , b : 16921 , 2 Count : 27 Nash : 1263 Max n : 430,000 Date : 2021-10-30

3, 13, 27, 61, 97, 121, 199, 219, 223, 327, 879, 1321, 1323, 1419, 1567, 6139, 8047, 19789, 20227, 20443, 33451, 35479, 222085, 261435, 267159, 319375, 425007

History

• 2021-10-30: Checked to n = 430000, Alexander Jones, released
• 2021-10-11: Reserved by Alexander Jones
• 2020-08-29: Checked to n = 50000, Alexander Jones
• 2011-11-23: Checked to n = 1007, Gary Barnes
• 2007-12-11: Found n = 425007, Chris Chatfield