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A173880 Primes p such that 5*p+2, 7*p+4 and 11*p+6 are also prime. 1
7, 61, 151, 157, 571, 997, 1447, 1831, 2251, 3121, 4057, 4177, 5011, 5737, 6907, 10321, 10357, 10567, 11941, 15601, 16477, 19267, 19597, 20347, 22447, 22531, 23131, 24121, 24337, 29587, 29641, 30181, 30817, 33577, 37201, 37447, 38671 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

Select[Prime[Range[5000]], PrimeQ[5 # + 2] && PrimeQ[7 # + 4] && PrimeQ[11 # + 6] &] (* Vincenzo Librandi, Apr 10 2013 *)

PROG

(MAGMA) [p: p in PrimesUpTo(100000) | IsPrime(p) and IsPrime(5*p+2) and IsPrime(7*p+4) and IsPrime(11*p+6)];

CROSSREFS

Sequence in context: A157871 A043085 A079672 * A100698 A141952 A289723

Adjacent sequences:  A173877 A173878 A173879 * A173881 A173882 A173883

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Mar 07 2010

STATUS

approved

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Last modified June 1 20:49 EDT 2020. Contains 334765 sequences. (Running on oeis4.)