using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _02SieveOfEratosten
{
    class SieveOfEraytosthenes
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            bool[] primes = new bool[n + 1];
            primes[0] = primes[1] = false;
            for (int i = 2; i <= n; i++)
            {
                primes[i] = true;

            }
            for (int i = 2; i <= n; i++)
            {
                if (primes[i])
                {
                    for (int j = i + i; j < primes.Length; j+=i)
                    {
                        primes[j] = false;
                    }
                }
            }
            for (int i = 0; i < primes.Length; i++)
            {
                if (primes[i])
                {
                    Console.WriteLine(i);
                }
            }
        }
    }
}