public void Calculate(int divNum)
{
PrimeCalculator primeCalc = new PrimeCalculator();
primes_ = primeCalc.GetFirstNPrimes(divNum);
povers_ = new List<int>();
nextMultiple_ = new SortedList<BigInt, int>();
for (int i = 0; i < primes_.Count; i++)
{
povers_.Add(0);
nextMultiple_.Add(primes_[i], i);
}
BigInt result = 1;
Console.WriteLine("start");
for (int i = 0; i < divNum; i++)
{
if (i%10000==0)
Console.WriteLine(i);
var key = nextMultiple_.Keys[0];
var minPrime = nextMultiple_[key];
//result *= key;
int pow = povers_[minPrime];
povers_[minPrime] = (pow + 1) * 2 - 1;
int nextPow = (povers_[minPrime] + 1) * 2 - 1;
BigInt newValue = 1;
for (int d = 0; d < nextPow - povers_[minPrime]; d++)
newValue *= primes_[minPrime];
nextMultiple_.RemoveAt(0);
nextMultiple_.Add(newValue, minPrime);
}
for (int i = 0; i < primes_.Count; i++)
{
if (i % 10000 == 0)
Console.WriteLine(i);
BigInt primMul = 1;
for (int j = 0; j < povers_[i]; j++)
primMul *= primes_[i];
if (primMul > 1)
{
result *= primMul;
result %= 500500507;
}
}
Console.WriteLine(result % 500500507);
}