import java.util.*;
import java.math.*;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		while(sc.hasNext()){
			int ct = 0;
			for(int i = sc.nextInt(); i>=1; --i){
				BigInteger b = new BigInteger(sc.next());
				if(b.isProbablePrime(5)) ++ct;
			}
			System.out.printf("%d\n", ct);
		}
	}
}

/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