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A034845
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Primes of the form iii...ijjj...j, i != j.
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1
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13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 113, 199, 211, 223, 227, 229, 233, 277, 311, 331, 337, 433, 443, 449, 499, 557, 577, 599, 661, 677, 733, 773, 811, 877, 881, 883, 887, 911, 977, 991, 997, 1117, 1777, 1999, 2111
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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[Union[Flatten[Table[FromDigits[Join[PadRight[{}, n, m], PadRight[{}, k, q]]], {n, 3}, {m, 9}, {k, 3}, {q, {1, 3, 7, 9}}]]], IntegerDigits[#][[1]]!=IntegerDigits[#][[-1]]&&PrimeQ[#]&] (* Harvey P. Dale, Apr 06 2022 *)
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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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STATUS
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approved
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