A046507 - OEIS

%I #16 Feb 16 2025 08:32:39

%S 186889,188869,246889,248869,264889,269779,279679,279967,284689,

%T 288389,288649,288839,296797,297967,376679,376769,377779,379667,

%U 379777,426889,444869,467879,467897,468289,468683,469787,469877,478679,478697,478769

%N Primes with multiplicative persistence value 7.

%H Daniel Mondot, <a href="/A046507/b046507.txt">Table of n, a(n) for n = 1..10000</a>

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MultiplicativePersistence.html">Multiplicative Persistence</a>

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

%Y Cf. A046500, A046516.

%K nonn,base,changed

%O 1,1

%A _Patrick De Geest_, Sep 15 1998