func_code_string: #include <bits/stdc++.h>   using namespace std;   const int mason[] = {2,       3,       5,        7,       13,      17,                        19,      31,      61,       89,      107,     127,                        521,     607,     1279,     2203,    2281,    3217,                        4253,    4423,    9689,     9941,    11213,   19937,                        21701,   23209,   44497,    86243,   110503,  132049,                        216091,  756839,  859433,   1257787, 1398269, 2976221,                        3021377, 6972593, 13466917, 20996011},             Mod = 1000000007;   int main() {     int n;     scanf( %d , &n);     int idx = mason[n - 1] - 1;     long long ret = 1LL, val = 2LL;     while (idx) {       if (idx & 1) ret = ret * val % Mod;       val = val * val % Mod;       idx >>= 1;     }     printf( %lld n , ret - 1);     return 0;   }   