A290402 Primes congruent to {7, 17} mod 24.

7, 17, 31, 41, 79, 89, 103, 113, 127, 137, 151, 199, 223, 233, 257, 271, 281, 353, 367, 401, 439, 449, 463, 487, 521, 569, 593, 607, 617, 631, 641, 727, 751, 761, 809, 823, 857, 881, 919, 929, 953, 967, 977, 991, 1039, 1049, 1063, 1087, 1097, 1193, 1217, 1231

Offset: 1

Author

Arkadiusz Wesolowski, Aug 03 2017

Keywords

• nonn

Comments

All these primes do not divide any number of the form 3*2^k - 1. Therefore, they are not in A001915.

Crossrefs

Cf. A001915, A107006, A107181.

Programs

Magma

[p: p in PrimesUpTo(1231) | p mod 24 in {7, 17}];

Mathematica

Select[Prime@Range[202], MemberQ[{7, 17}, Mod[#, 24]] &]

Formula

A107006 UNION A107181.