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A101250
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Primes that are a concatenation of 7, 11 and a prime.
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6
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71119, 71129, 71143, 71147, 71153, 71161, 71167, 71171, 711131, 711163, 711173, 711181, 711223, 711307, 711317, 711353, 711397, 711409, 711463, 711479, 711499, 711509, 711523, 711563, 711577, 711617, 711653, 711691, 711701, 711709, 711727
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OFFSET
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1,1
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LINKS
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EXAMPLE
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71119 is a prime concatenated from the primes 7, 11 and 19.
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MATHEMATICA
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Select[ Table[ FromDigits[ Flatten[ IntegerDigits /@ {7, 11, Prime[n]}]], {n, 130}], PrimeQ[ # ] &] (* Robert G. Wilson v, Dec 20 2004 *)
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CROSSREFS
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KEYWORD
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nonn,easy,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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