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A151913
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Numbers n for which (8+n!)/8 is prime.
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20
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7, 9, 10, 12, 14, 20, 23, 24, 29, 44, 108, 2049, 3072, 4862, 8807, 15089
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OFFSET
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1,1
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COMMENTS
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LINKS
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MATHEMATICA
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a = {}; Do[If[PrimeQ[(n! + 8)/8], AppendTo[a, n]], {n, 1, 500}]; a
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PROG
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CROSSREFS
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For primes of the form (8+k!!)/8 see A139066.
Cf. n!/m-1 is a prime: A002982, A082671, A139056, A139199-A139205; n!/m+1 is a prime: A002981, A082672, A089085, A139061, A139058, A139063, A139065, A151913, A137390, A139071 (1<=m<=10).
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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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