where (a de Moivre number) and is a prime.
Cyclotomic Factorization
See also
de Moivre Number, FactorizationExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Cyclotomic Factorization." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CyclotomicFactorization.html