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A068847 Smallest prime with same leading digits as 7^n. 2

%I #7 Dec 05 2013 19:55:14

%S 11,71,491,3433,24019,168071,11764967,8235431,576480103,403536071,

%T 2824752493,19773267431,1384128720101,9688901040727,6782230728491,

%U 474756150994337,3323293056960127,23263051398720713,162841359791044903

%N Smallest prime with same leading digits as 7^n.

%e a(3)=3433 because this is the smallest prime starting with 7^3=343.

%p for i from 0 to 30 do a := nextprime(7^i*10); b := 1; while(a-7^i*10^b>=10^b) do b := b+1; a := nextprime(7^i*10^b); end do; c[i] := a; end do:q := seq(c[i],i=0..30);

%Y Cf. A068846.

%K nonn,base

%O 0,1

%A _Amarnath Murthy_, Mar 10 2002

%E More terms from _Sascha Kurz_, Mar 17 2002

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Last modified May 27 20:38 EDT 2024. Contains 372882 sequences. (Running on oeis4.)