A045380 Primes congruent to 2 mod 5.

2, 7, 17, 37, 47, 67, 97, 107, 127, 137, 157, 167, 197, 227, 257, 277, 307, 317, 337, 347, 367, 397, 457, 467, 487, 547, 557, 577, 587, 607, 617, 647, 677, 727, 757, 787, 797, 827, 857, 877, 887, 907, 937, 947, 967, 977, 997, 1087, 1097, 1117, 1187, 1217, 1237

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Links

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

Crossrefs

Apart from the initial terms, essentially same as A030432 and A045357. Cf. A095022.

Programs

Magma

[p: p in PrimesUpTo(1300) | p mod 5 eq 2]; // Vincenzo Librandi, Aug 07 2012

Mathematica

Select[Prime@Range[210], Mod[ #, 5] == 2 &] (* Ray Chandler, Dec 06 2006 *)
Select[Range[2,1300,5],PrimeQ] (* Harvey P. Dale, Jul 22 2020 *)

PARI

is(n)=isprime(n) && n%5==2 \\ Charles R Greathouse IV, Jul 01 2016