Currently there may be errors shown on top of a page, because of a missing Wiki update (PHP version and extension DPL3).
Navigation
Topics Help • Register • News • History • How to • Sequences statistics • Template prototypes

Riesel primes of the form 2•3n-1

From Prime-Wiki
Revision as of 13:30, 16 March 2023 by Karbon (talk | contribs) (more hist)
Jump to: navigation, search

Current data

k , b : 2 , 3
Count : 37
Nash : 2685
Max n : 2,000,000
Date : 2021-01-26
1, 2, 3, 7, 8, 12, 20, 23, 27, 35, 56, 62, 68, 131, 222, 384, 387, 579, 644, 1772, 3751, 5270, 6335, 8544, 9204, 12312, 18806, 21114, 49340, 75551, 90012, 128295, 143552, 147488, 1010743, 1063844, 1360104
Remarks :
See H.C.Williams, C.R.Zarnke: "Some prime numbers of the forms 2A3^n+1 and 2A3^n-1" Math. Comp. 26 (1972), 995-998
The sequence A003307 in OEIS
See also Williams 2•3n-1

History