import java.util.Scanner;

class Main {
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int x;
		int ans = 0;
		
		for(int i = 0; i < n; i++){
			x = scan.nextInt();
			if(isprime(x))ans++;
		}
		System.out.println(ans);
	}
	
	public 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;
	}
} import java.util.Scanner; Scanner java.util class Main {
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int x;
		int ans = 0;
		
		for(int i = 0; i < n; i++){
			x = scan.nextInt();
			if(isprime(x))ans++;
		}
		System.out.println(ans);
	}
	
	public 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;
	}
} Main public static void main(String args[]){
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int x;
		int ans = 0;
		
		for(int i = 0; i < n; i++){
			x = scan.nextInt();
			if(isprime(x))ans++;
		}
		System.out.println(ans);
	} main {
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int x;
		int ans = 0;
		
		for(int i = 0; i < n; i++){
			x = scan.nextInt();
			if(isprime(x))ans++;
		}
		System.out.println(ans);
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan int x; x int ans = 0; ans 0 for(int i = 0; i < n; i++){
			x = scan.nextInt();
			if(isprime(x))ans++;
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			x = scan.nextInt();
			if(isprime(x))ans++;
		} {
			x = scan.nextInt();
			if(isprime(x))ans++;
		} x = scan.nextInt() x scan.nextInt() scan.nextInt scan if(isprime(x))ans++; isprime(x) isprime x ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String args[] args public 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;
		} 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;
		} 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;
			} return false; false i += 2 i 2 return true; true int x x
import java.util.Scanner;

class Main {
	public static void main(String args[]){
		Scanner scan = new Scanner(System.in);
		
		int n = scan.nextInt();
		int x;
		int ans = 0;
		
		for(int i = 0; i < n; i++){
			x = scan.nextInt();
			if(isprime(x))ans++;
		}
		System.out.println(ans);
	}
	
	public 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;
	}
}