import math
T = int(input())
for _ in range(T):
    N = int(input())
    A = list(map(int, input().split())) 
    v = 1
    for a in A:
        g = math.gcd(v,a)
        a = a//g
        v = v//g
        v = v*a
    if v == math.isqrt(v)**2:
        print('Yes')
    else:
        print('No')