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%I #7 Jun 17 2021 18:47:05
%S 7,71,701,7001,70001,700001,7000003,70000027,700000001,7000000001,
%T 70000000033,700000000009,7000000000009,70000000000009,
%U 700000000000051,7000000000000037,70000000000000003,700000000000000033
%N Smallest prime in which the n-th significant digit is a 7.
%p 7,seq(nextprime(7*10^j),j=1..32);
%t Join[{7},NextPrime/@(7*10^Range[20])] (* _Harvey P. Dale_, Jun 17 2021 *)
%Y Cf. A069588, A069589, A069590.
%K base,nonn
%O 1,1
%A _Amarnath Murthy_, Mar 25 2002
%E More terms from _Sascha Kurz_, Mar 28 2002
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