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Riesel primes of the form 39939•2n-1

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Current data

k , b : 39939 , 2
Type : 3
Count : 26
Nash : 1477
Max n : 50,000
Date : 2020-07-05
3, 5, 9, 17, 21, 23, 41, 47, 77, 179, 279, 407, 791, 929, 1323, 1929, 2757, 3009, 3375, 5277, 10019, 11363, 16617, 17483, 28359, 36927
Remarks :
This k-value seems the smallest k ≡ 0 mod 3 for which k•2n-1 is never prime for an even n. See Liskovets-Gallot conjectures.

History

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