import java.util.*;

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

	static boolean isPrime(int x){
		for (int i=2; i<=Math.pow(x,0.5); i++) {
			if(x%i == 0)
				return false;
		}
		return x!=1;
	}
}
/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