A217264 Numbers with 3 or more prime factors (with multiplicity) such that every concatenation of their prime factors is prime.

63, 549, 657, 833, 1127, 2009, 3311, 3971, 4149, 5043, 5409, 5491, 10539, 11493, 13059, 13941, 14517, 16839, 17591, 17991, 18621, 19133, 20259, 20781, 21119, 21249, 21537, 22023, 23471, 24183, 25529, 27181, 30897, 31653, 32153, 33271, 33309, 34227, 35443

Offset

1,1

Links

Table of n, a(n) for n=1..39.

Example

63 is 3*3*7. 337, 373 and 733 are all prime, so 63 is in the sequence.

Crossrefs

Cf. A217263, A217265, A180679, A181559.

Sequence in context: A283931 A038858 A307527 * A179537 A184448 A228262

Adjacent sequences: A217261 A217262 A217263 * A217265 A217266 A217267

Keyword

nonn,base

Author

Dmitri Kamenetsky, Sep 29 2012

Status

approved