import java.util.*;
import java.lang.Math;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(), x, i, j=3, ans = 0, ex = 0;
        for(i = 0; i < n; i++){
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        }
        System.out.println(ans);
    }
} import java.util.*; util.* java import java.lang.Math; Math java.lang public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(), x, i, j=3, ans = 0, ex = 0;
        for(i = 0; i < n; i++){
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        }
        System.out.println(ans);
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(), x, i, j=3, ans = 0, ex = 0;
        for(i = 0; i < n; i++){
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        }
        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(), x, i, j=3, ans = 0, ex = 0;
        for(i = 0; i < n; i++){
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        }
        System.out.println(ans);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt() n sc.nextInt() sc.nextInt sc x x i i j=3 j 3 ans = 0 ans 0 ex = 0; ex 0 for(i = 0; i < n; i++){
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        } i = 0; i = 0 i 0 i < n i n i++ i++ i {
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        } {
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        } x = sc.nextInt() x sc.nextInt() sc.nextInt sc ex=0 ex 0 if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            } x==2 x 2 ans++ ans if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            } x>2&&x%2!=0 x>2 x 2 x%2!=0 x%2 x 2 0 {
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            } for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                } j=2; j=2 j 2 j<=Math.sqrt(x) j Math.sqrt(x) Math.sqrt Math x j++ j++ j {
                    if(x%j==0)ex++;
                } {
                    if(x%j==0)ex++;
                } if(x%j==0)ex++; x%j==0 x%j x j 0 ex++ ex if(ex==0)ans++; ex==0 ex 0 ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(), x, i, j=3, ans = 0, ex = 0;
        for(i = 0; i < n; i++){
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        }
        System.out.println(ans);
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(), x, i, j=3, ans = 0, ex = 0;
        for(i = 0; i < n; i++){
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        }
        System.out.println(ans);
    }
} Main
import java.util.*;
import java.lang.Math;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(), x, i, j=3, ans = 0, ex = 0;
        for(i = 0; i < n; i++){
            x = sc.nextInt();
            //System.out.print(x);
            ex=0;
            if(x==2)ans++;
            else if(x>2&&x%2!=0){
                for(j=2; j<=Math.sqrt(x) ;j++){
                    if(x%j==0)ex++;
                }
                if(ex==0)ans++;
            }
            //System.out.println(" "+ans);
        }
        System.out.println(ans);
    }
}
