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A023250
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Primes that remain prime through 2 iterations of function f(x) = 4x + 3.
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2
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2, 7, 11, 37, 67, 89, 109, 149, 179, 257, 439, 467, 571, 677, 691, 719, 929, 977, 1019, 1279, 1381, 1447, 1549, 1567, 1747, 1787, 1901, 1931, 2111, 2161, 2207, 2287, 2347, 2377, 2459, 2539, 2671, 2711, 2819, 3119, 3229, 3371, 3491, 3607, 3637, 3821, 3877
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OFFSET
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1,1
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COMMENTS
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Primes p such that 4*p+3 and 16*p+15 are also primes. - Vincenzo Librandi, Aug 04 2010
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LINKS
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MAPLE
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MATHEMATICA
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Select[Range@ 3900, Times @@ Boole@ PrimeQ@ NestList[4 # + 3 &, #, 2] > 0 &] (* Michael De Vlieger, Sep 13 2016 *)
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PROG
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(Magma) [n: n in [0..100000] | IsPrime(n) and IsPrime(4*n+3) and IsPrime(16*n+15)] // Vincenzo Librandi, Aug 04 2010
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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