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%I #20 Jun 30 2023 12:48:56
%S 25,115,175,325,553,575,805,949,1105,1541,1729,1771,1825,1975,2413,
%T 2425,2465,2701,2737,2821,2885,3781,4207,4537,6601,6931,6943,7081,
%U 7189,7471,7501,7813,8725,8911,9085,9361,9809,10465,10585,11557,12025,13825,14425
%N Pseudoprimes to base 24.
%C Composite numbers n such that 24^(n-1) == 1 (mod n). - _Michel Lagneau_, Feb 18 2012
%H T. D. Noe, <a href="/A020152/b020152.txt">Table of n, a(n) for n = 1..1000</a>
%H <a href="/index/Ps#pseudoprimes">Index entries for sequences related to pseudoprimes</a>
%t base = 24; t = {}; n = 1; While[Length[t] < 100, n++; If[! PrimeQ[n] && PowerMod[base, n-1, n] == 1, AppendTo[t, n]]]; t (* _T. D. Noe_, Feb 21 2012 *)
%t Select[Range[15000],CompositeQ[#]&&PowerMod[24,#-1,#]==1&] (* _Harvey P. Dale_, Jun 30 2023 *)
%Y Cf. A001567 (pseudoprimes to base 2).
%K nonn
%O 1,1
%A _David W. Wilson_
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