func_code_string: #include <bits/stdc++.h>   using namespace std;   long long n, m, k, g[2010], a[100003], f[2010], ansn, sum1, sum2;   bool make[200];   int main() {     cin >> n >> m;     bool see = false;     for (int i = m; i > n; i--) {       for (int j = 2; j <= min((long long)100000, n) and !see; j++)         if (i % j == 0) {           see = true;         }       if (!see) return cout << i, 0;       see = false;     }     cout <<  -1 ;   }   