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A217264 Numbers with 3 or more prime factors (with multiplicity) such that every concatenation of their prime factors is prime. 4
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 7 14:09 EDT 2021. Contains 343650 sequences. (Running on oeis4.)