%I A067845
%S A067845 645,8911,93961,997633,9995671,99971821,999828727,9999109081,
%T A067845 99983971501,999986341201,9999946514845,99999856404001,999994510007533,
%U A067845 9999999191658001
%N A067845 Largest n-digit pseudoprime (in base 2).
%H A067845 Patrick De Geest, <a href="http://www.worldofnumbers.com/won125.htm">
               Smallest n-digit Pseudoprimes</a>
%e A067845 a(2)=8911, so largest pseudoprime (base 2) of 4 digits is 8911.
%Y A067845 Cf. A062568, A062852.
%Y A067845 Cf. A001567, A068216, A001262, A062568, A062852.
%Y A067845 Sequence in context: A089295 A100873 A063844 this_sequence A057942 A046020 
               A108821
%Y A067845 Adjacent sequences: A067842 A067843 A067844 this_sequence A067846 A067847 
               A067848
%K A067845 hard,more,nonn
%O A067845 3,1
%A A067845 Shyam Sunder Gupta (guptass(AT)rediffmail.com), Feb 14 2002
%E A067845 More terms from Farideh Firoozbakht (mymontain(AT)yahoo.com), Jan 11 
               2007