A226530 Numbers b such that b^(2^15) + 1 is prime (a generalized Fermat prime).

1, 70906, 167176, 204462, 249830, 321164, 330716, 332554, 429370, 499310, 524552, 553602, 743788, 825324, 831648, 855124, 999236, 1041870, 1074542, 1096382, 1113768, 1161054, 1167528, 1169486, 1171824, 1210354, 1217284, 1277444, 1519380, 1755378, 1909372, 1922592, 1986700, 2034902, 2147196, 2167350

Offset: 1

Author

Robert G. Wilson v, Jun 09 2013

Keywords

• nonn
• hard

Links

• Jeppe Stig Nielsen, Table of n, a(n) for n = 1..4346 (all terms below 460*10^6; terms 1..2729 from Ray Chandler)
• PrimeGrid, GFN Prime Search Status and History: n=15.

Crossrefs

Cf. A056993, A005574, A000068, A006314, A006313, A006315, A006316, A056994, A056995, A057465, A057002, A088361, A088362, A226528, A226529, A251597, A253854, A244150, A243959, A321323.

Programs

PARI

is(b)=isprime(b^2^15+1) \\ Charles R Greathouse IV, Feb 17 2017