OFFSET
1,1
COMMENTS
Composite numbers n such that 41^(n-1) == 1 (mod n).
LINKS
MATHEMATICA
base = 41; 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 *)
PROG
(Magma) [n: n in [1..3*10^4] | IsOne(Modexp(41, n-1, n)) and not IsPrime(n)]; // Vincenzo Librandi, Mar 15 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved