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A046502 Primes with multiplicative persistence value 2. 2
29, 37, 43, 53, 67, 73, 83, 127, 137, 163, 167, 173, 199, 223, 233, 251, 257, 269, 271, 281, 317, 349, 431, 439, 457, 461, 521, 523, 541, 547, 563, 569, 587, 599, 613, 617, 631, 641, 653, 659, 761, 821, 827, 853, 857, 859, 919, 991, 1129, 1153, 1163, 1217 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..51.

Eric Weisstein's World of Mathematics, Multiplicative Persistence

EXAMPLE

29 -> 2 * 9 -> [ 18 ] -> 1 * 8 -> [ 8 ] -> one digit in two steps.

CROSSREFS

Cf. A046500, A046511.

Sequence in context: A295490 A172195 A161724 * A255204 A049746 A097997

Adjacent sequences:  A046499 A046500 A046501 * A046503 A046504 A046505

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Sep 15 1998.

STATUS

approved

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Last modified August 25 10:46 EDT 2019. Contains 326324 sequences. (Running on oeis4.)