#include <iostream>
#include<cmath>
using namespace std;
ifstream in ("ciur.in");
ofstream out ("ciur.out");
int main()
{
    bool a[1000001];
    int nr=0,n,j,i;
    cin>>n;
    for(i=2;i<=n;i++)
    a[i]=1;
    for(i=2;i<=sqrt(n);i++)
    if(a[i]!=0)
    for(j=2;j<=n;j++)
    a[i*j]=0;
    for(i=2;i<=n;i++)
    if(a[i]==1)
    cout<<i<<"\n";
    return 0;
}