login
Pseudoprimes to base 92.
1

%I #18 Jun 13 2018 09:14:58

%S 21,39,65,91,93,105,217,231,273,301,341,403,451,465,559,561,651,861,

%T 1001,1085,1105,1209,1271,1333,1365,1393,1661,1729,2465,2587,2701,

%U 2821,3171,3731,3781,3913,4033,4123,4371,4641,4681,5565,6045,6169,6191,6697,7161

%N Pseudoprimes to base 92.

%C Composite numbers n such that 92^(n-1) == 1 (mod n). - _Michel Lagneau_, Feb 18 2012

%H T. D. Noe, <a href="/A020220/b020220.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 = 92; 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_