Maël Hostettler

Stop using runtime C++ exceptions

8

## Replace ```throw``` by ```std::exit``` As of LLVM 18, llvm-config --cxxflags contains -fno-exceptions, general standards are also moving out runtime exceptions in C++ as much as possible c.f. [stackoverflow discussion](https://stackoverflow.com/questions/4506369/when-and-how-should-i-use-exception-handling)....

Implement Barrett reduction for modular multiplication

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I would be interested in implementing Barrett reduction for modular multiplication. Even though the code seem to be in favor of a "beginner's implementation" (as described in a comment), I...

Add sorting, multiplication and gcd for `fmpz_factor_t`

1

This PR aims at implementing some basic form of sorting to compute gcd and multiplication of factorization structures. The end-goal is to use the `fmpz_factor_t` to do some bookkeeping, for...