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A163681
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Smaller prime p in Ormiston pairs (p, q) with q - p = 72.
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1
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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; internal format)
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OFFSET
| 1,1
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COMMENTS
| An Ormiston pair (or rearrangement prime pair) is a pair of consecutive primes that use the same digits in a different order.
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LINKS
| Jens Kruse Andersen, Ormiston Tuples
Eric Weisstein's World of Mathematics, Rearrangement Prime Pair
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EXAMPLE
| (1802419, 1802491) is an Ormiston pair with gap 72, so 1802419 is in the sequence.
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MATHEMATICA
| Transpose[Select[Select[Partition[Prime[Range[800000]], 2, 1], Last[#]-First[#]==72&], Sort[IntegerDigits[First[#]]]==Sort[IntegerDigits[Last[#]]]&]][[1]] (* From Harvey P. Dale, Feb 14 2011 *)
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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) ];
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CROSSREFS
| Subsequence of A069567.
Cf. A072274, A163863.
Sequence in context: A205952 A205463 A206749 * A185776 A002806 A053082
Adjacent sequences: A163678 A163679 A163680 * A163682 A163683 A163684
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KEYWORD
| nonn,base
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AUTHOR
| Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Aug 03 2009
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EXTENSIONS
| Keyword base added by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Sep 18 2009
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