// Exp computes x^exponent mod group.N.
Exp computes x^exponent mod group.N.
// Exp computes x^exponent mod group . N .
func (group *Zn) Exp(x, exponent *big.Int) *big.Int {
	r := new(big.Int)
	r.Exp(x, exponent, group.N)
	return r
}
func ( group * Zn ) Exp ( x , exponent * big . Int ) * big . Int { r := new ( big . Int ) r . Exp ( x , exponent , group . N ) return r }
Exp computes x^exponent mod group.N.
Exp computes x^exponent mod group . N .