import math
from queue import Queue
def solve() :
    N = int(input())
    A = list(map(int, input().split()))
    que = Queue()
    for a in A :
        que.put(a)
    for i in range(N-1) :
        a = que.get()
        b = que.get()
        que.put(a * b)
    ret = que.get()
    pk = math.sqrt(ret)
    pk -= 5
    while pk * pk < ret :
        pk += 1
    if pk * pk == ret :
        print("Yes")
    else :
        print("No")
T = int(input())
for i in range(T) :
    solve()