message: Added a comment in NthPower struct
diff: @@ -26,6 +26,7 @@ struct NthPower {
  NthPower(const Scalar& num_) : num(num_), pow(uint64_t(1)) {}
  NthPower(const Scalar& num_, const Scalar& pow_) : num(num_), pow(pow_) {}
  + // be careful and verify that you have catch on upper level
  void go_next() {
  pow *= num;
  if (pow == Scalar(uint64_t(1)))
  