A182296 Prime Riesel numbers: primes p such that p*2^k - 1 is composite for all positive integers k.
509203, 1330207, 2251349, 2554843, 2924861, 3177553, 3292241, 3580901, 3661529, 3661543, 4384979, 6055001, 7576559, 7629217, 8086751, 8643209, 9053711, 9203917, 9545351, 10219379, 10645867, 10913233, 10913681, 11694013, 11942443, 13161283, 14608183, 15627133
Offset: 1
Keywords
Examples
509203 is the first known prime p for which p*2^k - 1 is composite for all positive integers k, so a(1) = 509203.
Links
- Arkadiusz Wesolowski, Table of n, a(n) for n = 1..3701
- Eric Weisstein's World of Mathematics, Riesel Number
Comments