using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var res = new bool[t];
        for (var u = 0; u < t; ++u)
        {
            var n = NN;
            var a = NList;
            for (var i = 0; i < n; ++i) for (var j = i + 1; j < n; ++j)
            {
                var gcd = GCD(a[i], a[j]);
                if (gcd > 1)
                {
                    a[i] /= gcd;
                    a[j] /= gcd;
                }
            }
            var flg = true;
            for (var i = 0; i < n; ++i)
            {
                if (!IsSquare(a[i])) flg = false;
            }
            res[u] = flg;
        }
        WriteLine(string.Join("\n", res.Select(f => f ? "Yes" : "No")));
    }
    static long GCD(long a, long b)
    {
        if (a < b) return GCD(b, a);
        if (a % b == 0) return b;
        return GCD(b, a % b);
    }
    static bool IsSquare(long a)
    {
        var sq = (long)Math.Sqrt(a);
        return sq * sq == a || (sq + 1) * (sq + 1) == a;
    }
}