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A174365
Primes p such that 2*p^4+-9 are also prime.
1
2, 17, 101, 191, 647, 733, 2677, 4133, 4231, 6869, 8111, 15383, 15607, 16273, 17761, 18583, 23719, 24923, 30497, 30881, 32503, 33829, 42719, 43103, 44797, 47581, 50321, 56249, 56591, 56857, 56941, 60757, 70327, 70381, 77977, 81919, 84947
OFFSET
1,1
LINKS
EXAMPLE
For p=2, 2*2^4+-9=(23,41); p=17, 2*17^4+-9=(167033,167051).
MATHEMATICA
Select[Prime[Range[4000]], And@@PrimeQ[2 #^4 + {9, -9}]&] (* Vincenzo Librandi, Apr 10 2013 *)
PROG
(Magma) [p: p in PrimesUpTo(100000) | IsPrime(2*p^4-9) and IsPrime(2*p^4+9)];
CROSSREFS
Sequence in context: A109724 A127533 A023260 * A119363 A272065 A129977
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Mar 17 2010
STATUS
approved