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

Author

Dmitri Kamenetsky, Sep 29 2012

Keywords

• nonn
• base

Examples

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

Crossrefs

Cf. A217263, A217265, A180679, A181559.