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A099350
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Numbers k such that 4*k! - 1 is prime.
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11
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0, 1, 2, 3, 5, 6, 10, 11, 51, 63, 197, 313, 579, 1264, 2276, 2669, 4316, 4382, 4678
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OFFSET
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1,3
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COMMENTS
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LINKS
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EXAMPLE
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k = 5 is here because 4*5! - 1 = 479 is prime.
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MAPLE
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for n from 0 to 1000 do if isprime(4*n! - 1) then print(n) end if end do;
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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