#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return true; } return false; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return true; } return false; }
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pair<int,int>>
#define vll vector<pair<ll,ll>>
#define vvi vector<vector<int>>
#define vvl vector<vector<ll>>
#define vvii vector<vector<pair<int,int>>>
#define vvll vector<vector<pair<ll,ll>>>
#define vst vector<string>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define mkunique(x) sort(all(x));(x).erase(unique(all(x)),(x).end())
#define fi first
#define se second
#define mp make_pair
#define si(x) int(x.size())
const int mod=998244353,MAX=300005,INF=15<<26;

// BIT セグ木 遅延セグ木 のみ

// from: https://gist.github.com/yosupo06/ddd51afb727600fd95d9d8ad6c3c80c9
// (based on AtCoder STL)

#include <algorithm>
#include <array>
#ifdef _MSC_VER
#include <intrin.h>
#endif
namespace atcoder {
namespace internal {
int ceil_pow2(int n) {
    int x = 0;
    while ((1U << x) < (unsigned int)(n)) x++;
    return x;
}
int bsf(unsigned int n) {
#ifdef _MSC_VER
    unsigned long index;
    _BitScanForward(&index, n);
    return index;
#else
    return __builtin_ctz(n);
#endif
}
}  // namespace internal

}  // namespace atcoder

#include <cassert>
#include <numeric>
#include <type_traits>

namespace atcoder {

namespace internal {

#ifndef _MSC_VER
template <class T>
using is_signed_int128 =
typename std::conditional<std::is_same<T, __int128_t>::value ||
std::is_same<T, __int128>::value,
std::true_type,
std::false_type>::type;

template <class T>
using is_unsigned_int128 =
typename std::conditional<std::is_same<T, __uint128_t>::value ||
std::is_same<T, unsigned __int128>::value,
std::true_type,
std::false_type>::type;

template <class T>
using make_unsigned_int128 =
typename std::conditional<std::is_same<T, __int128_t>::value,
__uint128_t,
unsigned __int128>;

template <class T>
using is_integral = typename std::conditional<std::is_integral<T>::value ||
is_signed_int128<T>::value ||
is_unsigned_int128<T>::value,
std::true_type,
std::false_type>::type;

template <class T>
using is_signed_int = typename std::conditional<(is_integral<T>::value &&
                                                 std::is_signed<T>::value) ||
is_signed_int128<T>::value,
std::true_type,
std::false_type>::type;

template <class T>
using is_unsigned_int =
typename std::conditional<(is_integral<T>::value &&
                           std::is_unsigned<T>::value) ||
is_unsigned_int128<T>::value,
std::true_type,
std::false_type>::type;

template <class T>
using to_unsigned = typename std::conditional<
is_signed_int128<T>::value,
make_unsigned_int128<T>,
typename std::conditional<std::is_signed<T>::value,
std::make_unsigned<T>,
std::common_type<T>>::type>::type;

#else

template <class T> using is_integral = typename std::is_integral<T>;

template <class T>
using is_signed_int =
typename std::conditional<is_integral<T>::value && std::is_signed<T>::value,
std::true_type,
std::false_type>::type;

template <class T>
using is_unsigned_int =
typename std::conditional<is_integral<T>::value &&
std::is_unsigned<T>::value,
std::true_type,
std::false_type>::type;

template <class T>
using to_unsigned = typename std::conditional<is_signed_int<T>::value,
std::make_unsigned<T>,
std::common_type<T>>::type;

#endif

template <class T>
using is_signed_int_t = std::enable_if_t<is_signed_int<T>::value>;

template <class T>
using is_unsigned_int_t = std::enable_if_t<is_unsigned_int<T>::value>;

template <class T> using to_unsigned_t = typename to_unsigned<T>::type;

}  // namespace internal

}  // namespace atcoder

#include <cassert>
#include <vector>

namespace atcoder {

template <class T> struct fenwick_tree {
    using U = internal::to_unsigned_t<T>;
    
public:
    fenwick_tree() : _n(0) {}
    fenwick_tree(int n) : _n(n), data(n) {}
    
    void add(int p, T x) {
        assert(0 <= p && p < _n);
        p++;
        while (p <= _n) {
            data[p - 1] += U(x);
            p += p & -p;
        }
    }
    
    T sum(int l, int r) {
        assert(0 <= l && l <= r && r <= _n);
        return sum(r) - sum(l);
    }
    
private:
    int _n;
    std::vector<U> data;
    
    U sum(int r) {
        U s = 0;
        while (r > 0) {
            s += data[r - 1];
            r -= r & -r;
        }
        return s;
    }
};

}  // namespace atcoder


#include <algorithm>
#include <cassert>
#include <iostream>
#include <vector>
namespace atcoder {

template <class S,
S (*op)(S, S),
S (*e)(),
class F,
S (*mapping)(F, S),
F (*composition)(F, F),
F (*id)()>
struct lazy_segtree {
public:
    lazy_segtree() : lazy_segtree(0) {}
    lazy_segtree(int n) : lazy_segtree(std::vector<S>(n, e())) {}
    lazy_segtree(const std::vector<S>& v) : _n(int(v.size())) {
        log = internal::ceil_pow2(_n);
        size = 1 << log;
        d = std::vector<S>(2 * size, e());
        lz = std::vector<F>(size, id());
        for (int i = 0; i < _n; i++) d[size + i] = v[i];
        for (int i = size - 1; i >= 1; i--) {
            update(i);
        }
    }
    
    void set(int p, S x) {
        assert(0 <= p && p < _n);
        p += size;
        for (int i = log; i >= 1; i--) push(p >> i);
        d[p] = x;
        for (int i = 1; i <= log; i++) update(p >> i);
    }
    
    S get(int p) {
        assert(0 <= p && p < _n);
        p += size;
        for (int i = log; i >= 1; i--) push(p >> i);
        return d[p];
    }
    
    S prod(int l, int r) {
        assert(0 <= l && l <= r && r <= _n);
        if (l == r) return e();
        
        l += size;
        r += size;
        
        for (int i = log; i >= 1; i--) {
            if (((l >> i) << i) != l) push(l >> i);
            if (((r >> i) << i) != r) push(r >> i);
        }
        
        S sml = e(), smr = e();
        while (l < r) {
            if (l & 1) sml = op(sml, d[l++]);
            if (r & 1) smr = op(d[--r], smr);
            l >>= 1;
            r >>= 1;
        }
        
        return op(sml, smr);
    }
    
    S all_prod() { return d[1]; }
    
    void apply(int p, F f) {
        assert(0 <= p && p < _n);
        p += size;
        for (int i = log; i >= 1; i--) push(p >> i);
        d[p] = mapping(f, d[p]);
        for (int i = 1; i <= log; i++) update(p >> i);
    }
    void apply(int l, int r, F f) {
        assert(0 <= l && l <= r && r <= _n);
        if (l == r) return;
        
        l += size;
        r += size;
        
        for (int i = log; i >= 1; i--) {
            if (((l >> i) << i) != l) push(l >> i);
            if (((r >> i) << i) != r) push((r - 1) >> i);
        }
        
        {
            int l2 = l, r2 = r;
            while (l < r) {
                if (l & 1) all_apply(l++, f);
                if (r & 1) all_apply(--r, f);
                l >>= 1;
                r >>= 1;
            }
            l = l2;
            r = r2;
        }
        
        for (int i = 1; i <= log; i++) {
            if (((l >> i) << i) != l) update(l >> i);
            if (((r >> i) << i) != r) update((r - 1) >> i);
        }
    }
    
    template <bool (*g)(S)> int max_right(int l) {
        return max_right(l, [](S x) { return g(x); });
    }
    template <class G> int max_right(int l, G g) {
        assert(0 <= l && l <= _n);
        assert(g(e()));
        if (l == _n) return _n;
        l += size;
        for (int i = log; i >= 1; i--) push(l >> i);
        S sm = e();
        do {
            while (l % 2 == 0) l >>= 1;
            if (!g(op(sm, d[l]))) {
                while (l < size) {
                    push(l);
                    l = (2 * l);
                    if (g(op(sm, d[l]))) {
                        sm = op(sm, d[l]);
                        l++;
                    }
                }
                return l - size;
            }
            sm = op(sm, d[l]);
            l++;
        } while ((l & -l) != l);
        return _n;
    }
    
    template <bool (*g)(S)> int min_left(int r) {
        return min_left(r, [](S x) { return g(x); });
    }
    template <class G> int min_left(int r, G g) {
        assert(0 <= r && r <= _n);
        assert(g(e()));
        if (r == 0) return 0;
        r += size;
        for (int i = log; i >= 1; i--) push((r - 1) >> i);
        S sm = e();
        do {
            r--;
            while (r > 1 && (r % 2)) r >>= 1;
            if (!g(op(d[r], sm))) {
                while (r < size) {
                    push(r);
                    r = (2 * r + 1);
                    if (g(op(d[r], sm))) {
                        sm = op(d[r], sm);
                        r--;
                    }
                }
                return r + 1 - size;
            }
            sm = op(d[r], sm);
        } while ((r & -r) != r);
        return 0;
    }
    
private:
    int _n, size, log;
    std::vector<S> d;
    std::vector<F> lz;
    
    void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); }
    void all_apply(int k, F f) {
        d[k] = mapping(f, d[k]);
        if (k < size) lz[k] = composition(f, lz[k]);
    }
    void push(int k) {
        all_apply(2 * k, lz[k]);
        all_apply(2 * k + 1, lz[k]);
        lz[k] = id();
    }
};

}  // namespace atcoder

#include <algorithm>
#include <cassert>
#include <vector>

namespace atcoder {

template <class S, S (*op)(S, S), S (*e)()> struct segtree {
public:
    segtree() : segtree(0) {}
    segtree(int n) : segtree(std::vector<S>(n, e())) {}
    segtree(const std::vector<S>& v) : _n(int(v.size())) {
        log = internal::ceil_pow2(_n);
        size = 1 << log;
        d = std::vector<S>(2 * size, e());
        for (int i = 0; i < _n; i++) d[size + i] = v[i];
        for (int i = size - 1; i >= 1; i--) {
            update(i);
        }
    }
    
    void set(int p, S x) {
        assert(0 <= p && p < _n);
        p += size;
        d[p] = x;
        for (int i = 1; i <= log; i++) update(p >> i);
    }
    
    S get(int p) {
        assert(0 <= p && p < _n);
        return d[p + size];
    }
    
    S prod(int l, int r) {
        assert(0 <= l && l <= r && r <= _n);
        S sml = e(), smr = e();
        l += size;
        r += size;
        
        while (l < r) {
            if (l & 1) sml = op(sml, d[l++]);
            if (r & 1) smr = op(d[--r], smr);
            l >>= 1;
            r >>= 1;
        }
        return op(sml, smr);
    }
    
    S all_prod() { return d[1]; }
    
    template <bool (*f)(S)> int max_right(int l) {
        return max_right(l, [](S x) { return f(x); });
    }
    template <class F> int max_right(int l, F f) {
        assert(0 <= l && l <= _n);
        assert(f(e()));
        if (l == _n) return _n;
        l += size;
        S sm = e();
        do {
            while (l % 2 == 0) l >>= 1;
            if (!f(op(sm, d[l]))) {
                while (l < size) {
                    l = (2 * l);
                    if (f(op(sm, d[l]))) {
                        sm = op(sm, d[l]);
                        l++;
                    }
                }
                return l - size;
            }
            sm = op(sm, d[l]);
            l++;
        } while ((l & -l) != l);
        return _n;
    }
    
    template <bool (*f)(S)> int min_left(int r) {
        return min_left(r, [](S x) { return f(x); });
    }
    template <class F> int min_left(int r, F f) {
        assert(0 <= r && r <= _n);
        assert(f(e()));
        if (r == 0) return 0;
        r += size;
        S sm = e();
        do {
            r--;
            while (r > 1 && (r % 2)) r >>= 1;
            if (!f(op(d[r], sm))) {
                while (r < size) {
                    r = (2 * r + 1);
                    if (f(op(d[r], sm))) {
                        sm = op(d[r], sm);
                        r--;
                    }
                }
                return r + 1 - size;
            }
            sm = op(d[r], sm);
        } while ((r & -r) != r);
        return 0;
    }
    
private:
    int _n, size, log;
    std::vector<S> d;
    
    void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); }
};

}  // namespace atcoder

const ll M=9223372036854775807LL;

using T=ll;
using E=ll;

T f(T a,T b){
    return a&b;
}

T g(E a,T b){
    return a&b;
}

E h(E a,E b){
    return a&b;
}

T ti(){
    return M;
}

E ei(){
    return M;
}

//fastset

// https://www.dropbox.com/s/1zxohqaxrb87uft/Gifted_Infants_The_University_of_Tokyo___erated_files-job_14.pdf?dl=0

using uint = unsigned int ; using ll = long long ; using ull = unsigned long long ; template < class T > using V = vector <T>; template < class T > using VV = V <V<T>>;

int popcnt ( uint x ) { return __builtin_popcount(x); } int popcnt ( ull x ) { return __builtin_popcountll(x); } int bsr ( uint x ) { return 31 - __builtin_clz(x); } int bsr ( ull x ) { return 63 - __builtin_clzll(x); } int bsf ( uint x ) { return __builtin_ctz(x); } int bsf ( ull x ) { return __builtin_ctzll(x); }

struct FastSet {
    static constexpr uint B = 64 ;
    int n, lg;
    VV<ull> seg;
    FastSet( int _n) : n(_n) {
        do {
            seg.push_back(V<ull>((_n + B - 1 ) / B));
            _n = (_n + B - 1 ) / B;
        }while (_n > 1 );
        lg = seg.size();
    }
    bool operator []( int i) const {
        return (seg[ 0 ][i / B] >> (i % B) & 1 ) != 0 ;
    }
    void set ( int i) {
        for ( int h = 0 ; h < lg; h++) {
            seg[h][i / B] |= 1ULL << (i % B); i /= B;
        }
    }
    void reset ( int i) {
        for ( int h = 0 ; h < lg; h++) {
            seg[h][i / B] &= ~( 1ULL << (i % B));
            if (seg[h][i / B]) break ;
            i /= B;
        }
    }
    int next ( int i) {
        if (i < 0) i = 0;
        if (i > n) i = n;
        for ( int h = 0 ; h < lg; h++) {
            if (i / B == seg[h].size()) break ;
            ull d = seg[h][i / B] >> (i % B);
            if (!d) {
                i = i / B + 1 ;
                continue ;
            }
            i += bsf(d);
            for ( int g = h - 1 ; g >= 0 ; g--) {
                i *= B; i += bsf(seg[g][i / B]);
            }
            return i;
        }
        return n;
    }
    // i以上
    int prev ( int i) {
        if (i < 0) i = 0;
        if (i > n) i = n;
        i--;
        for ( int h = 0 ; h < lg; h++) {
            if (i == -1 ) break ;
            ull d = seg[h][i / B] << ( 63 - i % 64 );
            if (!d) {
                i = i / B - 1 ;
                continue ;
            }
            i += bsr(d) - (B - 1 );
            for ( int g = h - 1 ; g >= 0 ; g--) {
                i *= B;
                i += bsr(seg[g][i / B]);
            }
            return i;
        }
        return -1 ;
    }
    // i未満
};


int main(){
    
    std::ifstream in("text.txt");
    std::cin.rdbuf(in.rdbuf());
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    int N,Q;cin>>N>>Q;
    vector<FastSet> ZERO(63,FastSet(N)),ONE(63,FastSet(N));
    
    vector<T> def(N);
    
    for(int i=0;i<N;i++){
        cin>>def[i];
    }
    
    for(int t=0;t<63;t++){
        for(int i=0;i<N;i++){
            if(def[i]&(1LL<<t)){
                ONE[t].set(i);
            }else{
                ZERO[t].set(i);
            }
        }
    }
    
    atcoder::lazy_segtree<T,f,ti,E,g,h,ei> seg(def);
    
    while(Q--){
        int tt;cin>>tt;
        if(tt==1){
            ll l,r,x;cin>>l>>r>>x;l--;
            seg.apply(l,r,x);
            for(int t=0;t<63;t++){
                if(x&(1LL<<t)) continue;
                int now=l;
                while(now<r){
                    now=ONE[t].next(now);
                    if(now>=r) break;
                    ZERO[t].set(now);
                    ONE[t].reset(now);
                }
            }
        }
        if(tt==2){
            ll s,x;cin>>s>>x;s--;
            seg.set(s,x);
            for(int t=0;t<63;t++){
                ZERO[t].reset(s);
                ONE[t].reset(s);
                
                if(x&(1LL<<t)){
                    ONE[t].set(s);
                }else{
                    ZERO[t].set(s);
                }
            }
        }
        if(tt==3){
            ll l,r;cin>>l>>r;l--;
            ll ans=seg.prod(l,r);
            for(int t=62;t>=0;t--){
                int now=l,a=-1,b=-1;
                while(now<r){
                    now=ZERO[t].next(now);
                    if(now>=r) break;
                    if(a==-1){
                        a=now;
                    }else{
                        b=now;
                        break;
                    }
                    now++;
                    //cout<<t<<" "<<now<<endl;
                }
                if(a==-1) continue;
                if(b!=-1) continue;
                ll x=seg.prod(l,a),y=seg.prod(a+1,r);
                chmax(ans,x&y);
                break;
            }
            cout<<ans<<"\n";
        }
    }
}