
import java.util.Scanner;

/**
 * Created by shoya on 2017/04/14.
 */
public class Main {
    public static void main(String... args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int ans = 0;
        for (int i = 0; i < n; i++)
            ans += (isPrime(sc.nextInt())) ? 1 : 0;
        System.out.println(ans);
        return;
    }

    public static boolean isPrime(int n){
        int i = 2;
        while (i * i <= n) {
            if (n % i == 0)
                return false;
            i++;
        }
        return true;
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz