private static IEnumerable <int> FirstPrivateNumbers(int N)
{
return(Enumerable.Range(2, PrimeTool.nth_prime_upper(N))
.AsParallel()
.WithDegreeOfParallelism(Environment.ProcessorCount)
.WithExecutionMode(ParallelExecutionMode.ForceParallelism)
.WithMergeOptions(ParallelMergeOptions.NotBuffered) // remove order dependancy
.Where(x => PrimeTool.IsPrime(x))
.TakeWhile((n, index) => index < N)
.OrderBy(x => x).Take(500));
}
private static string FirstPrimeNumbers(int count)
{
StringBuilder sb = new StringBuilder();
int i = 2;
int k;
for (k = 1; k <= count;)
{
bool prime = PrimeTool.IsPrime(i);
if (prime)
{
sb.Append(" " + i);
k++;
}
i++;
}
Console.WriteLine($"The count is {k - 1}");
return(sb.ToString());
}
