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Smallest prime in which the n-th significant digit is a 4.
6

%I #7 Dec 05 2013 19:55:15

%S 41,401,4001,40009,400009,4000037,40000003,400000009,4000000007,

%T 40000000003,400000000019,4000000000039,40000000000001,

%U 400000000000063,4000000000000021,40000000000000063,400000000000000013

%N Smallest prime in which the n-th significant digit is a 4.

%p seq(nextprime(4*10^j),j=1..32);

%t NextPrime[4*10^Range[20]] (* _Harvey P. Dale_, Apr 11 2013 *)

%Y Cf. A069588, A069589, A069590, A069591, A069592, A069593.

%K base,nonn

%O 2,1

%A _Amarnath Murthy_, Mar 25 2002

%E More terms from _Sascha Kurz_, Mar 28 2002