import java.util.*;

public class Main {
    static boolean isPrime(int x){
        if(x==2) return true;
        if(x<2 || x%2==0) return false;
        int i = 3;
        while(i<=Math.sqrt(x)){
            if(x%i == 0) return false;
            i += 2;
        }
        return true;
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        for(int i=0;i<n;i++){
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        }
        System.out.println(count);
    }
}
 import java.util.*; util.* java public class Main {
    static boolean isPrime(int x){
        if(x==2) return true;
        if(x<2 || x%2==0) return false;
        int i = 3;
        while(i<=Math.sqrt(x)){
            if(x%i == 0) return false;
            i += 2;
        }
        return true;
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        for(int i=0;i<n;i++){
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        }
        System.out.println(count);
    }
} Main static boolean isPrime(int x){
        if(x==2) return true;
        if(x<2 || x%2==0) return false;
        int i = 3;
        while(i<=Math.sqrt(x)){
            if(x%i == 0) return false;
            i += 2;
        }
        return true;
    } isPrime {
        if(x==2) return true;
        if(x<2 || x%2==0) return false;
        int i = 3;
        while(i<=Math.sqrt(x)){
            if(x%i == 0) return false;
            i += 2;
        }
        return true;
    } if(x==2) return true; x==2 x 2 return true; true if(x<2 || x%2==0) return false; x<2 || x%2==0 x<2 x 2 x%2==0 x%2 x 2 0 return false; false int i = 3; i 3 while(i<=Math.sqrt(x)){
            if(x%i == 0) return false;
            i += 2;
        } i<=Math.sqrt(x) i Math.sqrt(x) Math.sqrt Math x {
            if(x%i == 0) return false;
            i += 2;
        } if(x%i == 0) return false; x%i == 0 x%i x i 0 return false; false i += 2 i 2 return true; true int x x public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        for(int i=0;i<n;i++){
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        }
        System.out.println(count);
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        for(int i=0;i<n;i++){
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        }
        System.out.println(count);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int count = 0; count 0 for(int i=0;i<n;i++){
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        } int i=0; int i=0; i 0 i<n i n i++ i++ i {
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        } {
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        } int x = sc.nextInt(); x sc.nextInt() sc.nextInt sc if(isPrime(x)) count++; isPrime(x) isPrime x count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args public class Main {
    static boolean isPrime(int x){
        if(x==2) return true;
        if(x<2 || x%2==0) return false;
        int i = 3;
        while(i<=Math.sqrt(x)){
            if(x%i == 0) return false;
            i += 2;
        }
        return true;
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        for(int i=0;i<n;i++){
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        }
        System.out.println(count);
    }
} public class Main {
    static boolean isPrime(int x){
        if(x==2) return true;
        if(x<2 || x%2==0) return false;
        int i = 3;
        while(i<=Math.sqrt(x)){
            if(x%i == 0) return false;
            i += 2;
        }
        return true;
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        for(int i=0;i<n;i++){
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        }
        System.out.println(count);
    }
} Main
import java.util.*;

public class Main {
    static boolean isPrime(int x){
        if(x==2) return true;
        if(x<2 || x%2==0) return false;
        int i = 3;
        while(i<=Math.sqrt(x)){
            if(x%i == 0) return false;
            i += 2;
        }
        return true;
    }
    
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        for(int i=0;i<n;i++){
            int x = sc.nextInt();
            if(isPrime(x)) count++;
        }
        System.out.println(count);
    }
}

