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A288715
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Primes of the form k!8+1, where k!8 is the octuple factorial number (A114800).
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1
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2, 3, 5, 7, 26881, 55441, 96909121, 132843110401, 48704929136641, 152349556104345601, 1397121162877440001, 383414179456168545484801, 81419177249980419349301811609600001, 13189906714496827934586893480755200001
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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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MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 8] + 1, {i, 0, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n, 1, -8]+1, {n, 200}], PrimeQ] (* Harvey P. Dale, Dec 26 2022 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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