using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var prime = Enumerable.Repeat(true, 5_000_001).ToArray();
        prime[1] = false;
        for (var i = 2; i < prime.Length; ++i)
        {
            if (prime[i])
            {
                for (var j = i * 2; j < prime.Length; j += i) prime[j] = false;
            }
        }
        var t = NN;
        var ans = new long[t];
        for (var u = 0; u < t; ++u)
        {
            var c = NList;
            if (c[1] == 2)
            {
                ans[u] = c[0] % 2;
            }
            else
            {
                ans[u] = prime[c[1]] ? 1 : -1;
            }
        }
        WriteLine(string.Join("\n", ans));
    }
}