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Riesel primes of the form 2•3n-1

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Current data

k , b : 2 , 3
Count : 37
Nash : 2685
Max n : 2,000,000
Date : 2021-01-26
1, 2[1], 3, 7[2], 8[3], 12[4], 20[5], 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

Notes

History