public static int CalculateSmallestMultiple(int lowerBoundary, int upperBoundary)
{
List <int> primesInBoundary = PrimeCalculator.CalculatePrimesInSpan(lowerBoundary, upperBoundary + 1);
int sqrtUpperBoundary = (int)Math.Sqrt(upperBoundary);
int answer = 1;
foreach (int prime in primesInBoundary)
{
if (prime <= sqrtUpperBoundary)
{
answer *= (int)Math.Pow(prime, (int)(Math.Log(upperBoundary) / Math.Log(prime)));
}
else
{
answer *= prime;
}
}
return(answer);
}