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A217080
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Numbers n such that (n^53-1)/(n-1) is prime.
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6
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24, 45, 60, 165, 235, 272, 285, 298, 307, 381, 416, 429, 623, 799, 858, 924, 929, 936, 1034, 1067, 1076, 1130, 1223, 1243, 1327, 1488, 1592, 1594, 1659, 1673, 1676, 1678, 1762, 1873, 1917, 1928, 1997, 2110, 2117, 2141, 2166, 2231, 2243, 2293, 2338, 2380, 2420
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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, 2500], PrimeQ[(#^53 - 1)/(# - 1)] &] (* T. D. Noe, Sep 26 2012 *)
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PROG
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(Magma) [n: n in [2..2450] |IsPrime((n^53 - 1) div (n - 1))]; // Vincenzo Librandi, Sep 28 2012
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CROSSREFS
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KEYWORD
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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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