#include <bits/stdc++.h>

using namespace std;

using ll = long long;

constexpr char newl = '\n';

constexpr ll MOD = 1000000007;

ll modpow(ll x, ll n, ll mod = MOD) {
    ll res = 1;
    while (n > 0) {
        if (n & 1) res = res * x % mod;
        x = x * x % mod;
        n >>= 1;
    }
    return res;
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int t;
    cin >> t;
    for (int i = 0; i < t; i++) {
        ll x, K;
        cin >> x >> K;
        if (x == 0) {
            cout << 0 << newl;
            continue;
        }
        constexpr ll hoge = 500000003 - 1;
        ll ans = modpow(x, modpow(K, hoge - 1, MOD - 1));
        cout << ans << newl;
    }

    return 0;
}