New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/pull/34030#issuecomment-1000804239

Comment:
The 27 seems to be a threshold for `mpz_fac_ui()`. Just to be sure, try your gmp library, e.g.
```c
#include <gmp.h>
#include <stdio.h>

int main()
{
    mpz_t x;

    mpz_init(x);

    mpz_fac_ui(x, 26);
    mpz_out_str(stdout, 10, x);
    puts("");

    mpz_fac_ui(x, 27);
    mpz_out_str(stdout, 10, x);
    puts("");
}
```
Here I get
```
$ cc fact.c -lgmp -ofact && ./fact 
403291461126605635584000000
10888869450418352160768000000
```