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%I #12 Oct 10 2019 03:59:45
%S 467,941,959941,3396199,4858943,5696101,6475643,7566133,7584253,
%T 7592261,9305281,9463877,11430491,13442243,14374837,15941473,17414497,
%U 17691997,19584223,21421849,22310159,22808459,27601163,29198881
%N Concatenation of prime p and nextprime(p) is prime -> cycles of 3 steps possible.
%C Terms from 3396199 up to 17691997 found by Jo Yeong Uk (hyukjo(AT)sigma.chungnam.ac.kr).
%H Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_029.htm">Puzzle 29. Pi = P i-1&nxtprm(P i-1), Pi = prime for i => 1</a>, The Prime Puzzles & Problems Connection.
%Y Cf. A030459, A034593, A036339, A036341.
%K nonn,base
%O 0,1
%A _Patrick De Geest_, Dec 15 1998