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A108653
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Numbers k such that 10^k - 113 is prime.
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0
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3, 4, 16, 21, 31, 70, 124, 131, 203, 309, 791, 975, 1015, 4367, 4451, 8495, 23523
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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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EXAMPLE
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If n=3 then 10^n - 113 = 887 (prime).
If n=31 then 10^n - 113 = 9999999999999999999999999999887 (prime).
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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hard,more,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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