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/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Main.java to edit this template
 */
package sodep_3;

/**
 *
 * @author tranh
 */
import java.util.*;

public class SoDep_3 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner cin = new Scanner(System.in);
        int t = cin.nextInt();
        while (t-- > 0) {
            String s1 = cin.next();
            //cin.nextLine();
            if (isConvert(s1) & isPrimeString(s1)) {
                System.out.println("YES");
            } else {
                System.out.println("NO");
            }
        }

    }

    private static boolean isPrimeString(String s) {
        for (int i = 0; i < s.length(); i++) {
            if (!isPrime(Integer.parseInt(String.valueOf(s.charAt(i))))) {
                return false;
            }
        }
        return true;
    }

    private static boolean isPrime(int n) {
        if (n < 2) {
            return false;
        }
        for (int i = 2; i * i <= n; i++) {
            if (n % i == 0) {
                return false;
            }
        }
        return true;
    }

    private static boolean isConvert(String s1) {
        String s2 = "";
        for (int i = 0; i < s1.length(); i++) {
            s2 += s1.charAt(i);
        }
        if (s1.equals(s2)) {
            return true;
        }
        return false;
    }

}