import sys
input = sys.stdin.readline
from collections import *
from math import gcd



for _ in range(int(input())):
    N = int(input())
    A = list(map(int, input().split()))
    
    for i in range(N):
        for j in range(i+1, N):
            G = gcd(A[i], A[j])
            A[i] //= G
            A[j] //= G
    
    for Ai in A:
        l, r = 0, Ai
    
        while l<=r:
            m = (l+r)//2
            
            if m*m<=Ai:
                l = m+1
            else:
                r = m-1
        
        if r*r!=Ai:
            print('No')
            break
    else:
        print('Yes')