SieveOfEratosthenes

public static bool[] SieveOfEratosthenes(int num)
{
    bool[] isPrime = new bool[num + 1];
    for (int i = 2; i <= num; i++) isPrime[i] = true;
    // Removing multiples.
    for (int i = 2; i <= num; i++)
    {
        if (isPrime[i])
        {
            for (int j = i * 2; j <= num; j += i) 
            	isPrime[j] = false; // Eliminate multiples of i.                
        }
    }
    return isPrime;
}

Source: paiza.io

Similar codes

5 votes101 views1 answer
C# send email
C#
1 vote99 views1 answer
Unity get script from gameobject
C#
0 vote119 views1 answer
C# recorrer una lista
C#
1 vote89 views2 answers
2d list c#
C#
0 vote135 views1 answer
Unity subtract float every second
C#Unity
21 votes130 views2 answers
Unity yield return
C#Unity
0 vote120 views1 answer
C# devexpress get foucused dataRow of child gridView
C#
0 vote98 views1 answer
How to make continuous progress bar
C#
13 votes137 views2 answers
How to make an object move in unity
C#Unity
2 votes98 views1 answer
C# linq extension methods left join
C#