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A126896
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Numbers k such that 10*k! + 1 is prime.
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9
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0, 1, 3, 4, 5, 23, 32, 39, 61, 349, 718, 805, 1025, 1194, 1550, 1774, 3417
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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 = 4 is a term because 10*4! + 1 = 241 is prime.
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PROG
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(PARI) is(k) = ispseudoprime(10*k!+1); \\ Jinyuan Wang, Feb 05 2020
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CROSSREFS
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KEYWORD
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nonn,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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