fn get_primes() -> Vec<bool> {
    const LIM: usize = 5 * 1e6 as usize;
    let mut flgs = vec![true; LIM+1];
    flgs[0] = false;
    flgs[1] = false;
    let limit = (LIM as f64).sqrt().ceil() as usize;
    for i in 0..=limit {
        if !flgs[i] { continue; }
        for j in i..=LIM/i {
            flgs[i*j] = false;
        }
    }
    flgs
}

fn main() {
    let mut t = String::new();
    std::io::stdin().read_line(&mut t).ok();
    let t: usize = t.trim().parse().unwrap();
    let primes = get_primes();
    for _ in 0..t {
        let mut ap = String::new();
        std::io::stdin().read_line(&mut ap).ok();
        let ap: Vec<usize> = ap.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
        let a = ap[0];
        let p = ap[1];
        if !primes[p] {
            println!("-1");
        } else {
            println!("{}", if a % p == 0 { 0 } else { 1 });
        }
    }
}