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A174365
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Primes p such that 2*p^4+-9 are also prime.
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1
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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
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OFFSET
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1,1
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LINKS
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EXAMPLE
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For p=2, 2*2^4+-9=(23,41); p=17, 2*17^4+-9=(167033,167051).
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MATHEMATICA
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Select[Prime[Range[4000]], And@@PrimeQ[2 #^4 + {9, -9}]&] (* Vincenzo Librandi, Apr 10 2013 *)
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PROG
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(Magma) [p: p in PrimesUpTo(100000) | IsPrime(2*p^4-9) and IsPrime(2*p^4+9)];
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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