use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let t: usize = itr.next().unwrap().parse().unwrap();
    const MAX: usize = 5000005;
    let mut is_prime: Vec<bool> = vec![true; MAX];
    is_prime[0] = false;
    is_prime[1] = false;
    for i in 2..MAX {
        if is_prime[i] {
            let mut j = i * 2;
            while j < MAX {
                is_prime[j] = false;
                j += i;
            }
        }
    }

    let mut out = Vec::new();
    for _ in 0..t {
        let a: u64 = itr.next().unwrap().parse().unwrap();
        let p: u64 = itr.next().unwrap().parse().unwrap();

        if is_prime[p as usize] {
            writeln!(out, "{}", if a % p == 0 { 0 } else { 1 }).ok();
        } else {
            writeln!(out, "-1").ok();
        }
    }
    stdout().write_all(&out).unwrap();
}