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Every prefix prime in base 7 (written in base 7).
3

%I #5 Mar 30 2012 18:35:23

%S 2,3,5,23,25,32,52,56,254,256,322,326,524,566,2564,3262,5246,5662,

%T 25642

%N Every prefix prime in base 7 (written in base 7).

%K nonn,base,fini,full

%O 1,1

%A _David W. Wilson_