A256397 Primes congruent to {17, 23} mod 24.

17, 23, 41, 47, 71, 89, 113, 137, 167, 191, 233, 239, 257, 263, 281, 311, 353, 359, 383, 401, 431, 449, 479, 503, 521, 569, 593, 599, 617, 641, 647, 719, 743, 761, 809, 839, 857, 863, 881, 887, 911, 929, 953, 977, 983, 1031, 1049, 1097, 1103, 1151, 1193

Offset: 1

Author

Arkadiusz Wesolowski, Jun 03 2015

Keywords

• nonn

Comments

All these primes do not divide any number of the form 2^k + 3. Therefore, they are not in A256396.

Crossrefs

Cf. A107181, A134517, A256396.

Programs

Magma

[p: p in PrimesUpTo(1193) | p mod 24 in {17, 23}];

Mathematica

Select[Prime@Range[196], MemberQ[{17, 23}, Mod[#, 24]] &]

PARI

select(p->my(k=p%24); k==17||k==23, primes(1000)) \\ Charles R Greathouse IV, Jun 03 2015

Formula

A107181 UNION A134517.