A046507 Primes with multiplicative persistence value 7.

186889, 188869, 246889, 248869, 264889, 269779, 279679, 279967, 284689, 288389, 288649, 288839, 296797, 297967, 376679, 376769, 377779, 379667, 379777, 426889, 444869, 467879, 467897, 468289, 468683, 469787, 469877, 478679, 478697, 478769

Offset: 1

Author

Patrick De Geest, Sep 15 1998

Keywords

• nonn
• base

Examples

			186889 -> [ 27648 ][ 2688 ][ 768 ][ 336 ][ 54 ][ 20 ][ 0 ] -> one digit in seven steps.
		

Links

• Daniel Mondot, Table of n, a(n) for n = 1..10000
• Eric Weisstein's World of Mathematics, Multiplicative Persistence

Crossrefs

Cf. A046500, A046516.