
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/detail/standard_policies.hpp>
using namespace __gnu_pbds;
using namespace std;


#define LETS_GET_SCHWIFTY ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);  
#define ff              first
#define ss              second
#define int             long long
#define ll              long long
#define pb              push_back
#define pii             pair<int,int>
#define vi              vector<int>
#define pqb             priority_queue<int>
#define pqs             priority_queue<int,vi,greater<int> >
#define setbits(x)      __builtin_popcountll(x)
#define zerobits(x)      __builtin_ctzll(x)
#define mod             998244353
#define inf             1e18
#define ps(x,y)         fixed<<setprecision(y)<<x
#define vpii            vector<pair<int,int> >
#define all(x)          x.begin(),x.end()
#define matrixprint(arr,a,b,c,d) for(int i=a;i<=c;i++){for(int j=b;j<=d;j++){cout<<arr[i][j]<<" ";}cout<<"\n";}
#define show(arr,x,y)   for(int i=x;i<=y;i++){cout<<arr[i]<<" ";}cout<<"\n"
#define sz(x)           (int)x.size()
#define db(x)           cout<<x<<"\n";

typedef tree<
int,
null_type,
less<int>,
rb_tree_tag,
tree_order_statistics_node_update>
ordered_set;

//insert,find_by_order,order_of_key,lower_bound,upper_bound;

#define TRACE
#ifdef TRACE
#define deb(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1>
void __f(const char* name, Arg1&& arg1) {
    cout << name << " : " << arg1 << std::endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args) {
    const char* comma = strchr(names + 1, ','); cout.write(names, comma - names) << " : " << arg1 << " | "; __f(comma + 1, args...);
}
#else
#define deb(...)
#endif

  
//////////////////////////////code//////////////////////////////

const int N = 200;



void solve()
{

      int ans = 1;

    int a , b;
    cin >> a >> b;

    for(int i = 1; i <= b ; i++)
    {
          int val1 = (a+i-1)/i;
          int val2 = val1 + 1;

        //  deb(i,val1,val2);

          if(i*val1 >= a && i*val2 <= b)
          {
              ans = max(ans,i);
          }
    }

    db(ans)



}

int32_t main()
{   

    LETS_GET_SCHWIFTY;

     #ifndef ONLINE_JUDGE
     freopen("INP.txt", "r", stdin);
     freopen("out.txt", "w", stdout);
     #endif  


    int t = 1;
   //cin >> t;

    while (t--)
        solve();

}

// check out for following mistakes-
// if using pb operation on vector and then trying to access index..check if sizeof that vec could remain 0 only
// is using prime sieve make sure it fits
// when using factorial template or combinatorics make sure that you edit fillfac fun values and array values


#include<bits/stdc++.h>
using namespace std;
#define DONTSYNC ios_base::sync_with_stdio(false);   cin.tie(NULL); cout.tie(NULL) //dont use stdio with iostream functions //input and output are out of order now!
#define TEST unsigned long long T; cin>>T; while(T--)  //loop over each testcase
#define endl "\n"
#define fori(a,start,end) for(int a=start;a<end;a++)
#define forll(a,start,end) for(long long a=start;a<end;a++)
#define forull(a,start,end) for(unsigned long long a=start;a<end;a++)
#define fi first
#define se second
typedef long long     ll;
typedef long double   ld;
typedef pair<int,int> pii;
typedef pair<ll,ll>   pll;
typedef vector<int>   vi;
typedef vector<ll>    vl;
typedef vector<pii>   vii;
typedef vector<pll>   vll;
typedef vector<vi>    vvi;
typedef vector<vl>    vvl;
const double PI = acos(-1);

void solve(){
    /* code */
    int a,b; cin>>a>>b;
    int res=1;
    fori(gd,2,b+1){
        if(b/gd*gd-gd>=a) res=gd;
    }
    cout<<res<<endl;
}

int main()
{
    DONTSYNC;
    // TEST
    solve();
    return 0;
}
