import java.util.Scanner;

class Main {
    public static Boolean PrimeCheck(int x){
	for(int i=2; i<=Math.sqrt(x);i++){
	    if(x%i==0){
		return false;
	    }
	}
	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(PrimeCheck(x)){
		 count++;
	     }
	 }
	 System.out.println(count);
     }
    
}
 import java.util.Scanner; Scanner java.util class Main {
    public static Boolean PrimeCheck(int x){
	for(int i=2; i<=Math.sqrt(x);i++){
	    if(x%i==0){
		return false;
	    }
	}
	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(PrimeCheck(x)){
		 count++;
	     }
	 }
	 System.out.println(count);
     }
    
} Main public static Boolean PrimeCheck(int x){
	for(int i=2; i<=Math.sqrt(x);i++){
	    if(x%i==0){
		return false;
	    }
	}
	return true;
    } PrimeCheck {
	for(int i=2; i<=Math.sqrt(x);i++){
	    if(x%i==0){
		return false;
	    }
	}
	return true;
    } for(int i=2; i<=Math.sqrt(x);i++){
	    if(x%i==0){
		return false;
	    }
	} int i=2; int i=2; i 2 i<=Math.sqrt(x) i Math.sqrt(x) Math.sqrt Math x i++ i++ i {
	    if(x%i==0){
		return false;
	    }
	} {
	    if(x%i==0){
		return false;
	    }
	} if(x%i==0){
		return false;
	    } x%i==0 x%i x i 0 {
		return false;
	    } return false; false 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(PrimeCheck(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(PrimeCheck(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(PrimeCheck(x)){
		 count++;
	     }
	 } int i=0; int i=0; i 0 i<n i n i++ i++ i {
	     int x = sc.nextInt();
	     if(PrimeCheck(x)){
		 count++;
	     }
	 } {
	     int x = sc.nextInt();
	     if(PrimeCheck(x)){
		 count++;
	     }
	 } int x = sc.nextInt(); x sc.nextInt() sc.nextInt sc if(PrimeCheck(x)){
		 count++;
	     } PrimeCheck(x) PrimeCheck x {
		 count++;
	     } count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args
import java.util.Scanner;

class Main {
    public static Boolean PrimeCheck(int x){
	for(int i=2; i<=Math.sqrt(x);i++){
	    if(x%i==0){
		return false;
	    }
	}
	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(PrimeCheck(x)){
		 count++;
	     }
	 }
	 System.out.println(count);
     }
    
}

