from math import gcd,sqrt
def all(List):
    for a in List:
        if a == int(sqrt(a)) ** 2:
            pass
        else:
            return False
    return True
T = int(input())
for _ in range(T):
    N = int(input())
    A = list(map(int,input().split()))
    for i in range(N):
        for k in range(i+1,N):
            g = gcd(A[i],A[k])
            A[i]//= g
            A[k]//=g
    if all(A):
        print('Yes')
    else:
        print('No')