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%I #5 Mar 31 2012 10:26:16
%S 7,97,977,7877,97777,787777,7877777,77767777,787777777,8777777777,
%T 79777777777,777777779777,7877777777777,77777779777777,
%U 778777777777777,8777777777777777,77797777777777777,797777777777777777
%N Largest n-digit prime with the most digits equal to 7.
%C Select first for the most 7's, then take the largest.
%Y Cf. A037067, A105977
%K nonn,base
%O 1,1
%A _Lekraj Beedassy_, May 17 2010
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