%I
%S 23,29,37,43,53,59,73,79,83,97,233,239,263,283,293,379,397,439,443,
%T 463,523,563,593,599,643,653,739,743,773,823,839,853,883,929,937,953,
%U 983,997,2333,2339,2383,2393,2399,2633,2663,2683,2693,2833,2939,2963,4463
%N Primes which remain prime after repeated operation "omit leftmost maximal digit".
%e 9929 is a member because 9929, 929, 29 and 2 are all prime.
%K base,easy,nonn
%O 1,1
%A _Zak Seidov_, Jan 27 2005
