A045391 Primes congruent to {1, 2} mod 7.

2, 23, 29, 37, 43, 71, 79, 107, 113, 127, 149, 163, 191, 197, 211, 233, 239, 281, 317, 331, 337, 359, 373, 379, 401, 421, 443, 449, 457, 463, 491, 499, 541, 547, 569, 617, 631, 653, 659, 673, 701, 709, 743, 751

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A000040, A045344, A045372.

Programs

Magma

[p: p in PrimesUpTo(1000) | p mod 7 in [1, 2]]; // Vincenzo Librandi, Aug 10 2012

Mathematica

Select[Prime[Range[300]],MemberQ[{1,2},Mod[#,7]]&] (* Vincenzo Librandi, Aug 10 2012 *)
Select[Flatten[#+{1,2}&/@(7*Range[0,120])],PrimeQ] (* Harvey P. Dale, Sep 15 2019 *)