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A139442
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Numbers n such that primorial(n)/2 - 8 is prime.
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5
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3, 4, 7, 9, 10, 11, 13, 15, 22, 23, 29, 45, 51, 52, 55, 69, 98, 122, 157, 268, 367, 476, 481, 1670, 1964, 2736, 4696, 7933, 22245
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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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k = 1; a = {}; Do[k = k*Prime[n]; If[PrimeQ[k - 8] && k > 8, Print[n]; AppendTo[a, n]], {n, 2, 481}]; a
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PROG
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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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