using System;

public class Program

{

    public static void Main()

    {

        int i=2;

        int j=2;

        while (i<100)

        {

            do

            {

                if ((i%j)==0) break;

                    if (j>(i/j))

                        Console.WriteLine("{0} es primo", i);

                        j++;

            }

            while (j<=(i/j));

            i++;

            }

    }

}