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