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Strong pseudoprimes to base 74.
1

%I #11 Aug 06 2015 11:36:18

%S 15,25,75,91,427,511,793,949,1387,1729,4453,4577,5551,6541,6643,7421,

%T 13333,13747,14295,15067,15135,27613,31171,38503,45025,55831,57889,

%U 76177,88357,88831,99499,115231,126217,133141,134413,146611,147109,176149

%N Strong pseudoprimes to base 74.

%H R. J. Mathar, <a href="/A020300/b020300.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_