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 A100633 Primes that are the decimal concatenation of three separate primes. 0
 257, 523, 1123, 1153, 1327, 1373, 1723, 1753, 1973, 2113, 2137, 2237, 2293, 2297, 2311, 2341, 2347, 2357, 2371, 2377, 2383, 2389, 2417, 2437, 2473, 2477, 2531, 2543, 2579, 2593, 2617, 2677, 2711, 2713, 2719, 2729, 2731, 2741, 2753, 2767, 2789, 2797 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA (*first do *) Needs["DiscreteMath`Combinatorica`"] (* then *) t = KSubsets[ Prime[ Range[25]], 3]; lst = {}; Do[k = 1; u = Permutations[ t[[n]]]; While[k < 7, v = FromDigits[ Flatten[IntegerDigits /@ u[[k]]]]; If[ PrimeQ[v], AppendTo[lst, v]]; k++ ], {n, Binomial[25, 3]}]; Take[ Union[lst], 42] CROSSREFS Cf. A100607. Sequence in context: A158231 A070815 A095321 * A007765 A250726 A142291 Adjacent sequences:  A100630 A100631 A100632 * A100634 A100635 A100636 KEYWORD nonn,base AUTHOR Robert G. Wilson v, Dec 03 2004 EXTENSIONS Edited by Charles R Greathouse IV, Apr 29 2010 STATUS approved

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Last modified July 22 17:31 EDT 2018. Contains 312914 sequences. (Running on oeis4.)