A188132 Primes p such that p == 3 (mod 4) and 6p+1 is prime.

3, 7, 11, 23, 47, 83, 103, 107, 131, 151, 263, 271, 283, 311, 331, 347, 367, 443, 467, 503, 607, 683, 727, 751, 787, 863, 887, 907, 947, 971, 1063, 1091, 1103, 1151, 1171, 1283, 1327, 1423, 1427, 1451, 1487, 1511, 1531, 1567, 1607, 1787, 1811, 1823, 1831, 1847, 1907, 1931, 1987

Offset: 1

Author

M. F. Hasler, Mar 21 2011

Keywords

• nonn

Comments

Complement of A188131 in A007693 \ {2}.

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A002515, A007693, A188131.

Programs

Mathematica

Select[Range[3, 2000, 4], PrimeQ[#] && PrimeQ[6# + 1] &] (* Amiram Eldar, Nov 13 2019 *)

PARI

forprime( p=1,1e4, p%4==3 & isprime(p*6+1) & print1(p", "))