A036340 Concatenation of prime p and nextprime(p) is prime -> cycles of 3 steps possible.

467, 941, 959941, 3396199, 4858943, 5696101, 6475643, 7566133, 7584253, 7592261, 9305281, 9463877, 11430491, 13442243, 14374837, 15941473, 17414497, 17691997, 19584223, 21421849, 22310159, 22808459, 27601163, 29198881

Offset: 0

Author

Patrick De Geest, Dec 15 1998

Keywords

• nonn
• base

Comments

Terms from 3396199 up to 17691997 found by Jo Yeong Uk (hyukjo(AT)sigma.chungnam.ac.kr).

Links

• Carlos Rivera, Puzzle 29. Pi = P i-1&nxtprm(P i-1), Pi = prime for i => 1, The Prime Puzzles & Problems Connection.

Crossrefs

Cf. A030459, A034593, A036339, A036341.