#include <bits/stdc++.h>
using namespace std;

#define NDEBUG
#include <cassert>

typedef long long ll;
typedef long double Double;
typedef unsigned long long ull;
typedef pair<int,int> ii;
typedef pair<ll,ll> llll;
typedef pair<double,double> dd;

typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<ll> vll;
typedef vector<string> vs;
typedef vector<double> vd;
typedef vector<long double> vD;

#define sz(a)  int((a).size())
#define pb  push_back
#define FOR(var,from,to) for(int var=(from);var<=(to);++var)
#define rep(var,n)  for(int var=0;var<(n);++var)
#define rep1(var,n)  for(int var=1;var<=(n);++var)
#define repC2(vari,varj,n)  for(int vari=0;vari<(n)-1;++vari)for(int varj=vari+1;varj<(n);++varj)
#define ALL(c)  (c).begin(),(c).end()
#define RALL(c)  (c).rbegin(),(c).rend()
#define tr(i,c)  for(auto i=(c).begin(); i!=(c).end(); ++i)
#define found(s,e)  ((s).find(e)!=(s).end())
#define mset(arr,val)  memset(arr,val,sizeof(arr))
#define mid(x,y) ((x)+((y)-(x))/2)
#define IN(x,a,b) ((a)<=(x)&&(x)<=(b))
#define cons make_pair


ll gcd(ll a, ll b) { while(a) swap(a, b%=a); return b; }

const ll MOD=1000000007LL;

ll ADD(ll x, ll y) { return (x+y) % MOD; }
ll SUB(ll x, ll y) { return (x-y+MOD) % MOD; }
ll MUL(ll x, ll y) { return x*y % MOD; }
ll POW(ll x, ll e) { ll v=1; for(; e; x=MUL(x,x), e>>=1) if (e&1) v = MUL(v,x); return v; }
ll DIV(ll x, ll y) { /*assert(y%MOD!=0);*/ return MUL(x, POW(y, MOD-2)); }

#define INTSPACE 12
char _buf[INTSPACE*1000000 + 3];

int loadint() {
    if (fgets(_buf, INTSPACE+3, stdin)==NULL) return 0;
    return atoi(_buf);
}

int loadvec(vector<int>& v, int N=-1) {
    if (N == 0) {
        v.clear();
        return 0;
    }
    if (N == -1) {
        N = loadint();
        if (N==0) return 0;
    }
    int bufsize = INTSPACE*N + 3;
    if (fgets(_buf, bufsize, stdin)==NULL) return 0;
    v.resize(N);

    int i=0;
    bool last = false;
    for (char *p=&_buf[0]; ;) {
        char *q = p;
        while (*q > ' ') ++q;
        if (*q == 0x0D || *q == 0x0A) last = true;
        *q = 0;
        v[i++] = atoi(p);
        if (last || i == N) break;
        p = q+1;
    }
    return i;
}
void read_cr() {
    fgets(_buf, 256, stdin);
}

const ll INFTY = 1LL << 52LL;

vector<vector<ll>> d(51, vector<ll>(51, INFTY));

bool possible(vii& ab, ll available) {
    int maxk = 0;
    for (ll k=1,m=1LL<<k; k<=50; ++k,m<<=1LL) {
        if (available & m) maxk = k;
    }

    rep(i,51) {
        rep(j, 51) d[i][j] = LLONG_MAX;
        d[i][i] = 0;
    }

    for (int i=50; i>=0; --i) {
        for (int j=i-1; j>=0; --j) {
            for (ll k=1,m=1LL<<k; k<=i-j; ++k,m<<=1) {
                if (!(available & m)) continue;
                if (i % k == j) { d[i][j] = m; break; }
            }
        }
    }
    rep(k,51) rep(i,51) rep(j,51) d[i][j] = min(d[i][j], d[i][k] | d[k][j]);

    for (ii p: ab) {
        int a = p.first, b = p.second;
        if (d[a][b] == LLONG_MAX) return false;
    }
    return true;
}

ll solve(int N, vi& a, vi& b) {
    vii ab;
    rep(i,N){
        if (a[i] == b[i]) continue;
        if (a[i] < b[i]) return -1LL;
        ab.pb(ii(a[i], b[i]));
    }

    ll mask = (1LL << 51LL) - 2;
    if (!possible(ab, mask)) return -1;

    ll ans = 0;
    for (ll k=50,m=1LL<<k; k>=1; --k,m>>=1LL) {
        if (possible(ab, mask & ~m)) {
            mask &= ~m;
        } else {
            ans |= m;
        }
    }
    return ans;
}

int main() {
    int N; scanf("%d", &N);
    read_cr();
    vi a(N), b(N);
    loadvec(a, N);
    loadvec(b, N);
    cout << solve(N,a,b) << endl;
    return 0;
}


Measured memory_bytes: 256