%I

%S 178,179,187,197,199,267,276,278,287,335,353,367,376,388,467,476,533,

%T 557,575,627,637,647,672,673,674,708,709,718,719,726,728,736,746,755,

%U 762,763,764,779,780,781,782,790,791,797,807,817,827,838,870,871,872

%N 6 steps needed to reach a prime under "Sum of digits raised to its digits' powers" procedure.

%Y Cf. A046431.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Jul 15 1998