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A260898
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Primes of the form (10^(k+2) + 107) / 9, (k > 0).
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2
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Select[Table[(10^(n + 2) + 107)/9, {n, 10^3}], PrimeQ] (* or *)
Select[FromDigits /@ Rest@ NestList["1" <> # &, "23", 10^3], PrimeQ]
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PROG
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(Magma) [a: n in [1..250] | IsPrime(a) where a is (10^(n+2) + 107) div 9 ]; // Vincenzo Librandi, Nov 29 2015
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CROSSREFS
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KEYWORD
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nonn,base,hard,more
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AUTHOR
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STATUS
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approved
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