using System;

​

public class Program

{

    public static void Main()

    {

        int i, j;

        for (i = 2; i < 100; i++)

        {

            for (j = 2; j <= (i / j); j++)

                if ((i % j) == 0)

                break;//if factor found, not prime

                if (j > (i / j))

                    Console.WriteLine("{0} is prime", i);

            }

    }

}