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A139453
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Numbers n such that primorial(n)/2 + 512 is prime.
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5
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4, 5, 6, 7, 9, 12, 73, 129, 142, 144, 253, 455, 531, 734, 1009, 1193, 1553, 2449, 3309, 13534, 17513, 17832, 22852
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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 = 1/2; a = {}; Do[k = k*Prime[n]; If[PrimeQ[k + 512], Print[n]; AppendTo[a, n]], {n, 325}]; a
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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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