Algebra`PolynomialPowerMod`
The functionality of PolynomialPowerMod is now available in the kernel function PolynomialRemainder.
Modulus is now an option to the kernel functions PolynomialQuotient and PolynomialRemainder.
Compute a power of a polynomial modulo a prime and a polynomial:
Version 5.2
The original package is now available on the web at library.wolfram.com/infocenter/MathSource/6758.