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A101218
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Primes that are a concatenation of 2, 3 and a prime.
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6
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233, 2311, 2341, 2347, 2371, 2383, 2389, 23131, 23167, 23173, 23197, 23227, 23251, 23269, 23293, 23311, 23431, 23509, 23557, 23563, 23593, 23599, 23677, 23719, 23743, 23761, 23773, 23827, 23857, 23887, 23911, 23929, 23971, 23977, 231019
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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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233 is a prime concatenated from the primes 2,3 and 3
2311 is a prime concatenated from the primes 2,3 and 11
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MATHEMATICA
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Select[23*10^IntegerLength[#]+#&/@Prime[Range[200]], PrimeQ] (* Harvey P. Dale, Jun 09 2013 *)
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CROSSREFS
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KEYWORD
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nonn,base,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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