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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
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.
Sequence in context: A247583 A206749 A244563 * A354560 A185776 A345083
KEYWORD
nonn,base
AUTHOR
Klaus Brockhaus, Aug 03 2009
EXTENSIONS
Keyword base added by Klaus Brockhaus, Sep 18 2009
STATUS
approved