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%I #11 Aug 06 2015 08:26:36
%S 9,27,1027,1387,1513,4033,6533,9773,10649,19513,20491,20797,27613,
%T 28009,28939,29891,31021,38503,43877,55981,56033,74971,80137,82513,
%U 83333,91001,92101,112471,113491,117569,128627,130759,147109,158701,164609,164917
%N Strong pseudoprimes to base 55.
%H R. J. Mathar, <a href="/A020281/b020281.txt">Table of n, a(n) for n = 1..300</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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