from math import gcd


t = int(input())
for i in range(t):
  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])
      if i == j: continue
      if g == 1: continue
      a[i] //= g
      a[j] //= g
  flg = 1
  for i in range(n):
    if a[i] != 1:
      sq  = int(a[i]**0.5)
      flg2 = 0
      for j in range(min(sq-5,0), sq+5):
        if sq**2 == a[i]:
          flg2 = 1
      if flg2: continue
      flg = 0
  if flg:
    print('Yes')
  else:
    print('No')