main.dart

void main() {
  var primeFactors = PrimeFactors();
  primeFactors.factors(8);
}

class PrimeFactors {
  List<int> factors(int num) {
    List<int> primeList = [];
    int divisable = 2;
    bool search = true;

    while (search) {
      if (num % divisable == 0) {
        primeList.add(divisable);
        num = num ~/ divisable;
        if (divisable == 2) {
          divisable++;
        } else
          divisable--;
      } else
        divisable++;
      if (divisable > 9) {
        search = false;
        if (primeList.isEmpty) {
          if (num == 1) return [];
          primeList.add(num);
        }
        return primeList;
      }
    }
  }
}