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(pow(now,0.5))
    for i in range(min(0, sq-5), sq+5):
      if sq ** 2 == now:
        now = 1
  if now == 1:
    print('Yes')
  else:
    print('No')