A144050 Primes p such that p-2, p-6, p-12, p-20, p-30, and p-42 are prime.

73, 109, 113173, 340939, 348463, 669679, 752293, 855739, 1107793, 1225129, 1416073, 3312193, 3319639, 3586909, 3804949, 4252123, 4867339, 4956823, 5327899, 5647513, 6057199, 6264373, 6929443, 8248069, 8422243, 8688613, 9189139, 10016563, 10499329, 10671319

Offset

1,1

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..1000

Mathematica

lst={}; Do[p1=Prime[n]; If[PrimeQ[p2=p1-2]&&PrimeQ[p3=p1-6]&&PrimeQ[p4=p1-12]&&PrimeQ[p5=p1-20]&&PrimeQ[p6=p1-30]&&PrimeQ[p7=p1-42], AppendTo[lst, p1]], {n, 10^5}]; lst
Select[Prime[Range[9, 710000]], AllTrue[#+{-2, -6, -12, -20, -30, -42}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Jun 01 2018 *)

Prog

(PARI) p=2; q=3; forprime(r=5, 4e9, if(p+6==r&&isprime(r-12)&&isprime(r-20)&&isprime(r-30)&&isprime(r-42), print1(r", ")); p=q; q=r) \\ Charles R Greathouse IV, Oct 04 2011

Crossrefs

Sequence in context: A238679 A157120 A118220 * A087878 A142196 A215963

Adjacent sequences: A144047 A144048 A144049 * A144051 A144052 A144053

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, Sep 08 2008

Status

approved