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%I #11 Aug 04 2015 06:34:52
%S 9,27,91,1405,1441,1541,2209,2863,3367,3481,5317,6031,9409,11359,
%T 14833,17141,17461,27937,31753,37219,50041,61391,62341,68251,80041,
%U 94657,96049,105931,123391,131131,146611,153145,161701,162401,171613,176689,179521
%N Strong pseudoprimes to base 53.
%H R. J. Mathar, <a href="/A020279/b020279.txt">Table of n, a(n) for n = 1..203</a>
%H <a href="/index/Ps#pseudoprimes">Index entries for sequences related to pseudoprimes</a>
%K nonn
%O 1,1
%A _David W. Wilson_
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