//Problem 10: Summation of primes
//The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.
//Find the sum of all the primes below two million.
//Problem 10 Answer: 142913828922
//First Elapsed Time (seconds): 4 hours something - forgot to sieve
//Second Elapsed Time (seconds): 0.0190295
public string GetAnswer()
{
var primes = PrimeHelper.FindPrimes_ToLimit(2000000);
var sum = primes.Sum();
return("Problem 10: " + sum.ToString());
}