from math import gcd
t = int(input())
for i in range(t):
  n = int(input())
  a = list(map(int,input().split()))
  now = 1
  for i in range(n):
    g = gcd(now, a[i])
    now = (now//g)*(a[i]//g)
  sq = int(now**0.5)
  if sq**2 == now:
    now = 1
  if now == 1:
    print('Yes')
  else:
    print('No')