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 A163681 Smaller prime p in Ormiston pairs (p, q) with q - p = 72. 1
 1290719, 1477219, 1802419, 2520697, 2902519, 3327419, 3391697, 3498119, 4596419, 4641919, 4709519, 5521819, 5835619, 6091031, 6267419, 6642919, 6943919, 7118519, 7480519, 8241019, 8630519, 8934319, 8946919, 9859697 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS An Ormiston pair (or rearrangement prime pair) is a pair of consecutive primes that use the same digits in a different order. LINKS Jens Kruse Andersen, Ormiston Tuples Eric Weisstein's World of Mathematics, Rearrangement Prime Pair EXAMPLE (1802419, 1802491) is an Ormiston pair with gap 72, so 1802419 is in the sequence. MATHEMATICA Transpose[Select[Select[Partition[Prime[Range[800000]], 2, 1], Last[#]-First[#]==72&], Sort[IntegerDigits[First[#]]]==Sort[IntegerDigits[Last[#]]]&]][[1]]  (* Harvey P. Dale, Feb 14 2011 *) PROG (MAGMA) [ p: p in PrimesUpTo(10000000) | q-p eq 72 and a eq b where a is Sort(Intseq(p)) where b is Sort(Intseq(q)) where q is NextPrime(p) ]; CROSSREFS Subsequence of A069567. Cf. A072274, A163863. Sequence in context: A247583 A206749 A244563 * A354560 A185776 A345083 Adjacent sequences:  A163678 A163679 A163680 * A163682 A163683 A163684 KEYWORD nonn,base AUTHOR Klaus Brockhaus, Aug 03 2009 EXTENSIONS Keyword base added by Klaus Brockhaus, Sep 18 2009 STATUS approved

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Last modified July 4 04:45 EDT 2022. Contains 355064 sequences. (Running on oeis4.)