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A165947
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Primes of the form 2q + 3 where q is composite.
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1
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11, 19, 23, 31, 43, 47, 53, 59, 67, 71, 73, 79, 83, 101, 103, 107, 113, 127, 131, 139, 151, 157, 163, 167, 173, 179, 191, 193, 199, 211, 223, 227, 233, 239, 241, 251, 263, 269, 271, 283, 293, 307, 311, 313, 331, 347, 353, 359, 367, 373, 379, 383, 409, 419, 421
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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Select[Table[If[PrimeQ[n], 0, 2n+3], {n, 2, 500}], PrimeQ] (* Harvey P. Dale, Mar 25 2011 *)
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PROG
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(PARI) lista(nn) = forcomposite(q=4, nn, if(isprime(p=2*q+3), print1(p, ", "))); \\ Altug Alkan, Apr 18 2016
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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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