login
Primes which can be expressed as concatenation of powers of 5 and 0's.
0

%I #3 Dec 05 2013 19:55:05

%S 5,11,101,151,251,1051,1151,1511,2551,5011,5051,5101,5501,10111,10151,

%T 10501,11251,11551,12511,15101,15511,15551,25111,50051,50101,50111,

%U 50551,51001,51151,51511,51551,52501,52511,55001

%N Primes which can be expressed as concatenation of powers of 5 and 0's.

%e 251 is a term as it is a concatenation of 25 and 1 which are powers of 5.

%K base,easy,nonn

%O 1,1

%A _Amarnath Murthy_, Dec 21 2001

%E Corrected and extended by Christopher Lund (clund(AT)san.rr.com), Apr 14 2002