#include<iostream> using namespace std; int main(){ int n; cin>>n; for(int i=2;i<=n-1;i++){ if(n%i==0) { cout<<"No"<<endl; return 0; } } cout<<"Yes"<<endl; return 0; } /*黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月 黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月黄泓月 */