#![allow(unused_imports)]
use std::cmp::*;
use std::collections::*;
use std::io::Write;
use std::ops::Bound::*;

#[allow(unused_macros)]
macro_rules! debug {
    ($($e:expr),*) => {
        #[cfg(debug_assertions)]
        $({
            let (e, mut err) = (stringify!($e), std::io::stderr());
            writeln!(err, "{} = {:?}", e, $e).unwrap()
        })*
    };
}

fn main() {
    let t = read::<usize>();
    for i in 0..t {
        if solve() {
            println!("Yes");
        } else {
            println!("No");
        }
    }
}

fn solve() -> bool {
    let n = read::<usize>();
    let mut a = read_vec::<i64>();
    for i in 0..n {
        for j in i + 1..n {
            let g = gcd(a[i], a[j]);
            a[i] /= g;
            a[j] /= g;
        }
    }
    a.iter().all(|&aa| {
        let sq = (aa as f64).sqrt() as i64;
        (sq - 2..=sq + 2).any(|c| c * c == aa)
    })
}

fn gcd(a: i64, b: i64) -> i64 {
    if b == 0 {
        return a;
    }
    gcd(b, a % b)
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}