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 A187399 A puzzle called "The hidden prime". 1
 12429793, 124097, 14239807, 135697, 7561, 15209167, 702991 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The first six terms are all emirps. - Arkadiusz Wesolowski, Mar 09 2011 Carlos Rivera asks for a 6-digit number (prime?) that follows from the first six numbers. No solution has been posted after several years. - T. D. Noe, Mar 09 2011 The sequence is a cycle of emirps with the middle two digits of each term the same as the second and next-to-last digits of the subsequent term. The first six terms are as given, the seventh term is the unique six-digit extension. - J. D. Lavelle, Jul 01 2018 LINKS Carlos Rivera, Puzzle 238, The Prime Puzzles & Problems Connection. CROSSREFS Cf. A006567. Sequence in context: A070189 A178069 A167233 * A102335 A083405 A147749 Adjacent sequences:  A187396 A187397 A187398 * A187400 A187401 A187402 KEYWORD nonn,fini,full AUTHOR Arkadiusz Wesolowski, Mar 09 2011 EXTENSIONS Puzzle solved and a(7) added by J. D. Lavelle, Jul 01 2018 STATUS approved

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Last modified January 18 16:27 EST 2020. Contains 331011 sequences. (Running on oeis4.)