import java.io.*;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;
public class Main {
	static String a;
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int n = stdIn.nextInt();
		int count = 0;
		IN:for(int i = 0; i < n; i++) {
			int x = stdIn.nextInt();
			for(int j = 2; j*j <= x; j++) {
				if(x % j == 0) continue IN;
			}
			count++;
		}
		System.out.println(count);
	}
} import java.io.*; io.* java import java.util.ArrayDeque; ArrayDeque java.util import java.util.ArrayList; ArrayList java.util import java.util.Arrays; Arrays java.util import java.util.Comparator; Comparator java.util import java.util.Scanner; Scanner java.util public class Main {
	static String a;
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int n = stdIn.nextInt();
		int count = 0;
		IN:for(int i = 0; i < n; i++) {
			int x = stdIn.nextInt();
			for(int j = 2; j*j <= x; j++) {
				if(x % j == 0) continue IN;
			}
			count++;
		}
		System.out.println(count);
	}
} Main static String a; a public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int n = stdIn.nextInt();
		int count = 0;
		IN:for(int i = 0; i < n; i++) {
			int x = stdIn.nextInt();
			for(int j = 2; j*j <= x; j++) {
				if(x % j == 0) continue IN;
			}
			count++;
		}
		System.out.println(count);
	} main {
		Scanner stdIn = new Scanner(System.in);
		int n = stdIn.nextInt();
		int count = 0;
		IN:for(int i = 0; i < n; i++) {
			int x = stdIn.nextInt();
			for(int j = 2; j*j <= x; j++) {
				if(x % j == 0) continue IN;
			}
			count++;
		}
		System.out.println(count);
	} Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) int n = stdIn.nextInt(); n stdIn.nextInt() stdIn.nextInt stdIn int count = 0; count 0 System.out.println(count) System.out.println System.out System System.out count String[] args args public class Main {
	static String a;
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int n = stdIn.nextInt();
		int count = 0;
		IN:for(int i = 0; i < n; i++) {
			int x = stdIn.nextInt();
			for(int j = 2; j*j <= x; j++) {
				if(x % j == 0) continue IN;
			}
			count++;
		}
		System.out.println(count);
	}
} public class Main {
	static String a;
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int n = stdIn.nextInt();
		int count = 0;
		IN:for(int i = 0; i < n; i++) {
			int x = stdIn.nextInt();
			for(int j = 2; j*j <= x; j++) {
				if(x % j == 0) continue IN;
			}
			count++;
		}
		System.out.println(count);
	}
} Main
import java.io.*;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;
public class Main {
	static String a;
	public static void main(String[] args) {
		Scanner stdIn = new Scanner(System.in);
		int n = stdIn.nextInt();
		int count = 0;
		IN:for(int i = 0; i < n; i++) {
			int x = stdIn.nextInt();
			for(int j = 2; j*j <= x; j++) {
				if(x % j == 0) continue IN;
			}
			count++;
		}
		System.out.println(count);
	}
}