login
A046502
Primes with multiplicative persistence value 2.
3
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
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Multiplicative Persistence
EXAMPLE
29 -> 2 * 9 -> [ 18 ] -> 1 * 8 -> [ 8 ] -> one digit in two steps.
CROSSREFS
Intersection of A000040 and A046511.
Cf. A046500.
Sequence in context: A295490 A172195 A161724 * A255204 A049746 A097997
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Sep 15 1998
STATUS
approved