Riesel primes of the form 20421•2n-1

Current data

k , b : 20421 , {{{Rb}}} Count : 27 Nash : 2181 Max n : 50,000 Date : 2020-08-12

1, 3, 13, 15, 27, 42, 57, 58, 114, 282, 291, 351, 435, 483, 507, 823, 847, 1119, 1698, 4005, 16255, 20163, 29211, 31515, 38530, 49413, 485253

[[Category:Riesel {{{Rb}}}|#.....20421]][[Category:Riesel {{{Rb}}} Missing-range‎|#.....20421]]

History

• 2020-08-12: Checked to n = 50000, Karsten Bonath
• 2011-02-27: Found n = 485253, (Oddball), Twin Prime Search