/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author
 */

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
#define VI vector<int>
#define G(size_1) vector<vector<int>>(size_1, vector<int>())
#define SZ(x) ((int)(x).size())
#define READ ({int t;cin >> t;t;})
#define PII pair<int, int>

#define FOR(i, _begin, _end) for (__typeof(_end) end = _end, begin = _begin,  i = (begin) - ((begin) > (end)); i != (end) - ((begin) > (end)); i += 1 - 2 * ((begin) > (end)))
#define REP(i, end) for (__typeof(end) i = 0, _len = (end); i < (_len); i += 1)
#define ALL(x) (x).begin(),(x).end()
#define RALL(x) (x).rbegin(),(x).rend()
#define F first
#define S second
#define y0 y3487465
#define y1 y8687969
#define j0 j1347829
#define j1 j234892
#define MOD(x, m) ((((x) % (m)) + (m)) % (m))
#define BIT(n) (1LL<<(n))
#define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() );
#define EB emplace_back
#define PB push_back
#define fcout cout << fixed << setprecision(12)
#define fcerr cerr << fixed << setprecision(12)
#define print(x) cout << (x) << '\n'
#define printE(x) cout << (x) << endl
#define fprint(x) cout << fixed << setprecision(12) << (x) << endl
# define BYE(a) do { cout << (a) << endl; return ; } while (false)

#ifdef DEBUG
#define ERR(args...) { string _s = #args; replace(_s.begin(), _s.end(), ',', ' '); stringstream _ss(_s); istream_iterator<string> _it(_ss); _err(cerr,_it, args); }
#define DBG(x) std::cerr << #x << " = " << x << endl;
#else
#define DBG(x) {};
#define ERR(args...) {};
#endif

void _err(std::ostream &cerr, istream_iterator<string> it) { cerr << endl; }

template<typename T, typename... Args>
void _err(std::ostream &cerr, istream_iterator<string> it, T a, Args... args) {
    cerr << *it << " = " << a << "  ";
    _err(cerr, ++it, args...);
}

const double pi = 2 * acos(.0);
const int inf = 0x3f3f3f3f;
const ll mod = (ll) (1e9) + 7;

template<class T>
bool Chmax(T &a, const T &b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}

template<class T>
bool Chmin(T &a, const T &b) {
    if (b < a) {
        a = b;
        return 1;
    }
    return 0;
}

template<typename T>
istream &operator>>(istream &is, vector<T> &V) {
    for (auto &&ele : V)is >> ele;
    return is;
}

template<typename T>
ostream &operator<<(ostream &os, const vector<T> V) {
    os << "[";
    int cnt = 0;
    T curr;
    if (!V.empty()) {
        for (int i = 0; i < V.size() - 1; ++i) {
            if (V[i] == curr)cnt++;
            else cnt = 0;
            if (cnt == 4)os << "... ";
            if (cnt < 4)
                os << i << ":" << V[i] << " ";
            curr = V[i];
        }
        os << V.size() - 1 << ":" << V.back();
    }
    os << "]\n";
    return os;
}

template<typename T, typename U>
ostream &operator<<(ostream &os, const pair<T, U> P) {
    os << "(";
    os << P.first << "," << P.second;
    os << ")";
    return os;
}

template<typename T, typename U>
ostream &operator<<(ostream &os, const set<T, U> V) {
    os << "{";
    if (!V.empty()) {
        auto it = V.begin();
        for (int i = 0; i < V.size() - 1; ++i) {
            os << *it << " ";
            it++;
        }
        os << *it;
    }
    os << "}\n";
    return os;
}

template<typename K, typename H, typename P>
ostream &operator<<(ostream &os, const unordered_set<K, H, P> V) {
    os << "{";
    if (!V.empty()) {
        auto it = V.begin();
        for (int i = 0; i < V.size() - 1; ++i) {
            os << *it << " ";
            it++;
        }
        os << *it;
    }
    os << "}\n";
    return os;
}

template<typename K, typename C>
ostream &operator<<(ostream &os, const multiset<K, C> V) {
    os << "{";
    if (!V.empty()) {
        auto it = V.begin();
        for (int i = 0; i < V.size() - 1; ++i) {
            os << *it << " ";
            it++;
        }
        os << *it;
    }
    os << "}";
    return os;
}

template<typename K, typename T, typename C>
ostream &operator<<(ostream &os, const map<K, T, C> V) {
    os << "{";
    if (!V.empty()) {
        auto it = V.begin();
        for (int i = 0; i < V.size() - 1; ++i) {
            os << "(";
            os << it->first << "," << it->second;
            os << ") ";
            it++;
        }
        os << "(";
        os << it->first << "," << it->second;
        os << ")";
    }
    os << "}\n";
    return os;
}

template<typename K, typename T, typename C>
ostream &operator<<(ostream &os, const unordered_map<K, T, C> V) {
    os << "{";
    if (!V.empty()) {
        auto it = V.begin();
        for (int i = 0; i < V.size() - 1; ++i) {
            os << "(";
            os << it->first << "," << it->second;
            os << ") ";
            it++;
        }
        os << "(";
        os << it->first << "," << it->second;
        os << ")";
    }
    os << "}\n";
    return os;
}

template<typename T>
ostream &operator<<(ostream &os, const deque<T> V) {
    os << "[";
    if (!V.empty()) {
        for (int i = 0; i < V.size() - 1; ++i) {
            os << V[i] << "->";
        }
        if (!V.empty())os << V.back();
    }
    os << "]\n";
    return os;
};

template<typename T, typename Cont, typename Comp>
ostream &operator<<(ostream &os, const priority_queue<T, Cont, Comp> V) {
    priority_queue<T, Cont, Comp> _V = V;
    os << "[";
    if (!_V.empty()) {
        while (_V.size() > 1) {
            os << _V.top() << "->";
            _V.pop();
        }
        os << _V.top();
    }
    os << "]\n";
    return os;
};

template<class F>
struct y_combinator {
    F f; // the lambda will be stored here

    // a forwarding operator():
    template<class... Args>
    decltype(auto) operator()(Args &&... args) const {
        // we pass ourselves to f, then the arguments.
        // the lambda should take the first argument as `auto&& recurse` or similar.
        return f(*this, std::forward<Args>(args)...);
    }
};

// helper function that deduces the type of the lambda:
template<class F>
y_combinator<std::decay_t<F>> recursive(F &&f) {
    return {std::forward<F>(f)};
}

struct hash_pair {
    template<class T1, class T2>
    size_t operator()(const pair<T1, T2> &p) const {
        auto hash1 = hash<T1>{}(p.first);
        auto hash2 = hash<T2>{}(p.second);
        return hash1 ^ hash2;
    }

};

template<typename T, typename U>
std::vector<T> multi_vector(int n, U v) {
    return std::vector<T>(n, v);
}

template<typename U, typename... Args>
auto multi_vector(int n, Args... args) {
    auto val = multi_vector<U>(std::forward<Args>(args)...);
    return std::vector<decltype(val)>(n, std::move(val));
}

class No1140EXPotentiaLLL {
public:

    void solve(std::istream &cin, std::ostream &cout, std::ostream &cerr) {
        int testcases;
        cin >> testcases;
        int N = 6e6 + 5;
        VI isprime(N+1,1);
        isprime[1] = 0;
        for(int p = 2;p*p<=N;p++){
            if(isprime[p]){
                for(int i = p*p;i<=N;i+=p)isprime[i] = 0;
            }
        }
        ERR(isprime)
        for (int case_num = 1; case_num <= testcases; case_num++) {
            ll A, P;
            cin >> A >> P;
            if (isprime[P]) {
                print(!!(A%P));
            } else
                print(-1);
        }

    }


};


#undef int
int main() {

	No1140EXPotentiaLLL solver;
	std::istream& in(std::cin);
	std::ostream& out(std::cout);
    std::ostringstream err;
	in.tie(0); ios::sync_with_stdio(0);
    solver.solve(in, out,err);
	return 0;
}