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Pseudoprimes to base 88.
1

%I #19 Jun 13 2018 09:17:52

%S 87,91,133,145,217,247,267,403,445,481,589,645,1105,1247,1729,1885,

%T 1891,2047,2465,2581,2611,2821,3165,3565,4123,4331,4849,4921,5365,

%U 5551,5785,6119,6601,6697,7087,7657,7743,7745,8029,8911,9073,10585,11481,11563

%N Pseudoprimes to base 88.

%C Composite numbers n such that 88^(n-1) == 1 (mod n). - _Michel Lagneau_, Feb 18 2012

%H T. D. Noe, <a href="/A020216/b020216.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 = 88; 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 *)

%Y Cf. A001567 (pseudoprimes to base 2).

%K nonn

%O 1,1

%A _David W. Wilson_