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 A217372 Initial prime in the first Ormiston n-tuple. 1
 2, 1913, 11117123, 6607882123, 20847942560791 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS An Ormiston n-tuple is n consecutive primes containing the same decimal digits in different order. a(5) found by Giovanni Resta. a(6) may be 166389896360719. LINKS Table of n, a(n) for n=1..5. Jens Kruse Andersen, Ormiston Tuples A. Edwards, Ormiston Pairs, Australian Mathematics Teacher, Vol. 58, No. 2 (2002), pp 12-13. E. W. Weisstein, Rearrangement Prime Pair at MathWorld.Wolfram.com. EXAMPLE (1913, 1931) is the first case of two consecutive primes with the same digits. The first 3-, 4- and 5-tuples are: (11117123, 11117213, 11117321), (6607882123, 6607882213, 6607882231, 6607882321), (20847942560791, 20847942560917, 20847942560971, 20847942561079, 20847942561097). CROSSREFS Cf. A069567 (Ormiston pairs), A075093 (triples), A161160 (quadruples), A217797 (5-tuples) Sequence in context: A329663 A069793 A230082 * A160299 A232963 A238119 Adjacent sequences: A217369 A217370 A217371 * A217373 A217374 A217375 KEYWORD nonn,base,hard AUTHOR Jens Kruse Andersen, Oct 20 2012 STATUS approved

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Last modified March 2 21:56 EST 2024. Contains 370498 sequences. (Running on oeis4.)