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1, 2, 3, 7, 15, 19, 31, 33, 35, 37, 51, 65, 69, 77, 79, 85, 91, 95, 97, 133, 139, 141, 143, 145, 157, 159, 161, 177, 187, 199, 209, 211, 213, 215, 217, 229, 235, 247, 255, 267, 271, 299, 303, 307, 319, 331, 335, 337, 339, 341, 345, 365, 367, 371, 379, 391, 393
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OFFSET
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1,2
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COMMENTS
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LINKS
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MATHEMATICA
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Select[Range[400], PrimeQ[# + EulerPhi[#]] &] (* Carl Najafi, Aug 22 2011 *)
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PROG
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(PARI) isok(n) = isprime(n+eulerphi(n)); \\ Michel Marcus, Aug 22 2015
(Magma) [n: n in [1..400] |IsPrime(n+EulerPhi(n))]; // Vincenzo Librandi, Dec 19 2015
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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