A175238 Primes p such that (p^2-6) and (p^2-8) are also prime.

5, 7, 17, 23, 53, 67, 367, 373, 383, 467, 487, 647, 773, 823, 1087, 1103, 1187, 1327, 1493, 1607, 1613, 1697, 1787, 2593, 2683, 2753, 2797, 2803, 2833, 2903, 3217, 4373, 4547, 4937, 5147, 5527, 5987, 6067, 6163, 6367, 6827, 7103, 7193, 7297, 8353, 8627

Offset

1,1

Links

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

Example

For p=5,(19,17); p=7,(43,41); p=17,(283,281).

Mathematica

Select[Prime[Range[1000]], And@@PrimeQ[#^2 + {-6, -8}]&] (* Vincenzo Librandi, Apr 10 2013 *)

Prog

(Magma) [p: p in PrimesUpTo(10000) | IsPrime(p^2-6) and IsPrime(p^2-8)]

Crossrefs

Sequence in context: A265812 A128352 A025085 * A240030 A032412 A114970

Adjacent sequences: A175235 A175236 A175237 * A175239 A175240 A175241

Keyword

nonn,easy

Author

Vincenzo Librandi, Mar 09 2010

Status

approved