#include <bits/stdc++.h>
#define int long long

using namespace std;

ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }

typedef long long ll;

template <typename T>
struct sparse_table{
    static const int N = 1e5 + 10, L = 20;
    T a[N];
    int d[N][L], rem[N];
    void build(int n) {
        for (int i = 1; i <= n; i++) { d[i][0] = i; }
        for (int j = 1; j <= L - 1; j++) {
            for (int i = 1; i <= n; i++) {
                if (i + (1 << j) - 1 > n) { continue; }
                d[i][j] = gcd(a[d[i][j - 1]], a[d[i + (1 << (j - 1))][j - 1]]);
            }
        }
        for (int i = 1; i <= n; i++) { rem[i] = log2(i); }
    }
    T get(int l, int r) {
        int lg = rem[r - l + 1];
        return gcd(a[d[l][lg]], a[d[r - (1 << lg) + 1][lg]]);
    }
};

sparse_table<ll> table;

const int N = 1e5 + 10;
ll a[N];
vector<pair<int, ll>> rig[N];

void precalc(int n) {
    for (int i = 1; i <= n; i++) {
        table.a[i] = a[i];
    }
    table.build(n);

    rig[n] = {{n, a[n]}};

    for (int l = n - 1; l >= 1; l--) {
        rig[l] = {{l, a[l]}};
        for (auto [r, val] : rig[l + 1]) {
            val = __gcd(val, a[l]);
            if (val == rig[l].back().second) {
                rig[l].back().first = r;
            } else {
                rig[l].emplace_back(r, val);
            }
        }
    }
}

vector<ll> get(int l, int r, int k) {
    if (k >= r - l + 1) {
        return {0};
    } else if (k == 0) {
        return {table.get(l, r)};
    } else {
        vector<ll> res;
        {
            auto nxt = get(l + 1, r, k - 1);
            for (ll x : nxt) {
                res.push_back(x);
            }
        }
        {
            auto nxt = get(l, r - 1, k - 1);
            for (ll x : nxt) {
                res.push_back(x);
            }
        }
        for (auto [x, val] : rig[l]) {
            auto nxt = get(x + 2, r, k - 1);
            for (auto nxt_val : nxt) {
                res.push_back(gcd(val, nxt_val));
            }
        }
        return res;
    }
}

ll solve(int l, int r, int k) {
    auto res = get(l, r, k);
    ll ans = 0;
    for (ll x : res) {
        ans = max(ans, x);
    }
    return ans;
}

signed
 main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#endif

    int n, q;
    cin >> n >> q;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }

    precalc(n);

    while (q--) {
        int l, r, k;
        cin >> l >> r >> k;
        cout << solve(l, r, k) << "\n";
    }

#ifdef LOCAL
    cout << "\nTime elapsed: " << double(clock()) / CLOCKS_PER_SEC << " s.\n";
#endif
}

answer.code:6:1: error: ‘ll’ does not name a type
    6 | ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; }
      | ^~