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A217074
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Numbers n such that (n^29-1)/(n-1) is prime.
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7
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6, 40, 65, 70, 114, 151, 221, 229, 268, 283, 398, 451, 460, 519, 554, 587, 627, 628, 659, 687, 699, 859, 884, 915, 943, 974, 986, 1101, 1120, 1159, 1176, 1212, 1223, 1297, 1312, 1322, 1337, 1390, 1409, 1415, 1446, 1477, 1508, 1592, 1636, 1691, 1800, 1802, 1803
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Select[Range[2, 2000], PrimeQ[(#^29 - 1)/(# - 1)] &] (* T. D. Noe, Sep 26 2012 *)
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PROG
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(Magma) [n: n in [2..2000] |IsPrime((n^29 - 1) div (n - 1))]; // Vincenzo Librandi, Sep 28 2012
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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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EXTENSIONS
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STATUS
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approved
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