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A032631
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Primes that are concatenations of n with n + 8.
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1
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19, 311, 1321, 1523, 2129, 3947, 4957, 5563, 6977, 7583, 9199, 111119, 115123, 159167, 163171, 165173, 169177, 171179, 183191, 193201, 195203, 199207, 201209, 205213, 211219, 229237, 235243, 241249, 249257, 265273
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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[FromDigits[Flatten[IntegerDigits/@{n, n+8}]], {n, 1, 301, 2}], PrimeQ](* Harvey P. Dale, Sep 07 2019 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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