Are you famiiar with valgrind? It is a great tool for detecting memory
leaks. I used it to oonfirm that GMP indeed does not leak for your test
cases. (You seem to have forgotten to mention the system you used for
these experiments; I used an amd64 cpu running debian.)
Your analysis of what is
Dear Susumu tsukamoto,
I tried valgrind with the following simplified program and it shows no memory
leak:
$ cat test_mul.c
#include "gmp.h"
int main()
{
long int num = 20; // 200,000,000
long int ik;
mpz_t DC;
printf(" start: num= %'ld \n", num);
