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

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		int primeCnt = 0;
		for (int i = 0; i < n; i++) {
			if (checkPrimeNumber(Integer.parseInt(br.readLine()))) primeCnt++;
		}
		System.out.println(primeCnt);
	}

	public static boolean checkPrimeNumber(int target) {
		if (target < 2) return false;
		if (target == 2) return true;
		if (target % 2 == 0) return false;

		for (int i = 3; i <= Math.sqrt(target); i++) {
			if (target % i == 0) return false;
		}
		return true;
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz