Quote:
Originally Posted by devarajkandadai
In the ring of Gaussian integers 33  4*I = (2  I)*(3+2*I)*(4I) is a Devaraj number ( ref: A 104016 and A 104017 in OEIS ) which acts like a Carmichael number with reference to modified Fermat's theorem excepting when p = 5, 13 and 17 (norms of the three factors).
Recall modified Fermat's theorem: a^(p^21)==1 (mod p) where a is a quadratic algebraic integer.

Ignore this as it needs further investigation.