/*
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 * and open the template in the editor.
 */
package farsid;

/**
 *
 * @author Farsid
 */

import java.util.Scanner;
import java .math.BigInteger;

class Farsid {

    /**
     * @param args the command line arguments
     */

    public static void main(String[] args) {
        // TODO code application logic here
        Scanner scan= new Scanner(System.in);
        int T=scan.nextInt();int cas=1,a;
        for(cas=1;cas<=T;cas++)
        {
            int n=scan.nextInt();
            a=scan.nextInt();
            BigInteger lcm=BigInteger.valueOf(a);
            for(int i=1;i<n;i++)
            {
               a=scan.nextInt();
               BigInteger val=BigInteger.valueOf(a);
               //System.out.println(val);
               BigInteger gcd= lcm.gcd(val);
               //System.out.println(gcd);
               val=val.multiply(lcm);
               //System.out.println(val);
               lcm=val.divide(gcd);
               //System.out.println(lcm);
            }
            System.out.println("Case "+cas + ": "+lcm+ "\n");
        }
       // System.out.println();
    }

}