import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());

		int findCount = 0;
		for (int i = 0; i < n; i++) {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		}
		System.out.println(findCount);
	}

	public static boolean isPrime(int num) {
		if (num < 2) {
			return false;
		} else if (num == 2) {
			return true;
		} else if (num % 2 == 0) {
			return false;
		}

		double sqrtNum = Math.sqrt(num);
		for (int i = 3; i <= sqrtNum; i += 2) {
			if (num % i == 0) {
				return false;
			}
		}
		return true;
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());

		int findCount = 0;
		for (int i = 0; i < n; i++) {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		}
		System.out.println(findCount);
	}

	public static boolean isPrime(int num) {
		if (num < 2) {
			return false;
		} else if (num == 2) {
			return true;
		} else if (num % 2 == 0) {
			return false;
		}

		double sqrtNum = Math.sqrt(num);
		for (int i = 3; i <= sqrtNum; i += 2) {
			if (num % i == 0) {
				return false;
			}
		}
		return true;
	}
} Main public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());

		int findCount = 0;
		for (int i = 0; i < n; i++) {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		}
		System.out.println(findCount);
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());

		int findCount = 0;
		for (int i = 0; i < n; i++) {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		}
		System.out.println(findCount);
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int n = Integer.parseInt(br.readLine()); n Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br int findCount = 0; findCount 0 for (int i = 0; i < n; i++) {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		} int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		} {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		} int num = Integer.parseInt(br.readLine()); num Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br if (isPrime(num)) {
				findCount++;
			} isPrime(num) isPrime num {
				findCount++;
			} findCount++ findCount System.out.println(findCount) System.out.println System.out System System.out findCount String[] args args public static boolean isPrime(int num) {
		if (num < 2) {
			return false;
		} else if (num == 2) {
			return true;
		} else if (num % 2 == 0) {
			return false;
		}

		double sqrtNum = Math.sqrt(num);
		for (int i = 3; i <= sqrtNum; i += 2) {
			if (num % i == 0) {
				return false;
			}
		}
		return true;
	} isPrime {
		if (num < 2) {
			return false;
		} else if (num == 2) {
			return true;
		} else if (num % 2 == 0) {
			return false;
		}

		double sqrtNum = Math.sqrt(num);
		for (int i = 3; i <= sqrtNum; i += 2) {
			if (num % i == 0) {
				return false;
			}
		}
		return true;
	} if (num < 2) {
			return false;
		} else if (num == 2) {
			return true;
		} else if (num % 2 == 0) {
			return false;
		} num < 2 num 2 {
			return false;
		} return false; false if (num == 2) {
			return true;
		} else if (num % 2 == 0) {
			return false;
		} num == 2 num 2 {
			return true;
		} return true; true if (num % 2 == 0) {
			return false;
		} num % 2 == 0 num % 2 num 2 0 {
			return false;
		} return false; false double sqrtNum = Math.sqrt(num); sqrtNum Math.sqrt(num) Math.sqrt Math num for (int i = 3; i <= sqrtNum; i += 2) {
			if (num % i == 0) {
				return false;
			}
		} int i = 3; int i = 3; i 3 i <= sqrtNum i sqrtNum i += 2 i += 2 i 2 {
			if (num % i == 0) {
				return false;
			}
		} {
			if (num % i == 0) {
				return false;
			}
		} if (num % i == 0) {
				return false;
			} num % i == 0 num % i num i 0 {
				return false;
			} return false; false return true; true int num num public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());

		int findCount = 0;
		for (int i = 0; i < n; i++) {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		}
		System.out.println(findCount);
	}

	public static boolean isPrime(int num) {
		if (num < 2) {
			return false;
		} else if (num == 2) {
			return true;
		} else if (num % 2 == 0) {
			return false;
		}

		double sqrtNum = Math.sqrt(num);
		for (int i = 3; i <= sqrtNum; i += 2) {
			if (num % i == 0) {
				return false;
			}
		}
		return true;
	}
} public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());

		int findCount = 0;
		for (int i = 0; i < n; i++) {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		}
		System.out.println(findCount);
	}

	public static boolean isPrime(int num) {
		if (num < 2) {
			return false;
		} else if (num == 2) {
			return true;
		} else if (num % 2 == 0) {
			return false;
		}

		double sqrtNum = Math.sqrt(num);
		for (int i = 3; i <= sqrtNum; i += 2) {
			if (num % i == 0) {
				return false;
			}
		}
		return true;
	}
} Main
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());

		int findCount = 0;
		for (int i = 0; i < n; i++) {
			int num = Integer.parseInt(br.readLine());
			if (isPrime(num)) {
				findCount++;
			}
		}
		System.out.println(findCount);
	}

	public static boolean isPrime(int num) {
		if (num < 2) {
			return false;
		} else if (num == 2) {
			return true;
		} else if (num % 2 == 0) {
			return false;
		}

		double sqrtNum = Math.sqrt(num);
		for (int i = 3; i <= sqrtNum; i += 2) {
			if (num % i == 0) {
				return false;
			}
		}
		return true;
	}
}