%I #8 Dec 28 2023 15:30:03
%S 7,97,9973,99999989,9999999999999937,99999999999999999999999999999979,
%T 9999999999999999999999999999999999999999999999999999999999999949
%N Largest prime with 2^n digits.
%t NextPrime[10^2^Range[0,6],-1] (* _Harvey P. Dale_, Dec 28 2023 *)
%Y Cf. A157036, A003618, A157033, A157034.
%K nonn,base
%O 0,1
%A _Lekraj Beedassy_, Feb 22 2009