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A139058
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Numbers n such that (5+n!)/5 is prime.
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26
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7, 9, 11, 14, 19, 23, 45, 121, 131, 194, 735, 751, 1316, 1372, 2084, 2562, 5678, 5758, 12533, 24222
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OFFSET
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1,1
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COMMENTS
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For primes of the form (5+n!)/5 see A139059.
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LINKS
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MATHEMATICA
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a = {}; Do[If[PrimeQ[(n! + 5)/5], AppendTo[a, n]], {n, 1, 751}]; a
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PROG
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(Magma) [ n: n in [5..734] | IsPrime((Factorial(n)+5) div 5) ];
(PARI) A139058(n) = local(k=(n!+5)\5); if(isprime(k), k, 0);
for(n=5, 800, if(A139058(n)>0, print1(n, ", ")))
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CROSSREFS
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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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