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Factorer.h
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Factorer.h
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//
// Created by Alex Gisi on 5/17/22.
//
#include <gmpxx.h>
#include <vector>
#ifndef FACTOR_FACTORER_H
#define FACTOR_FACTORER_H
using ull = unsigned long long;
class Factorer {
typedef mpz_class (Factorer::*FactorizerFn)() const;
public:
explicit Factorer(mpz_class num);
static mpz_class gcd(mpz_class a, mpz_class b);
[[nodiscard]] bool is_prime(int n = 5) const;
static mpz_class rand_range(const mpz_class& min, const mpz_class& max);
static mpz_class rand_digits(int n);
static ull rand_range(ull min, ull max);
static mpz_class fast_exp(const mpz_class& a, unsigned long x);
static mpz_class fast_expm(const mpz_class& a, unsigned long x, const mpz_class& m);
static mpz_class fast_expm_mpz(const mpz_class& a, const mpz_class& x, const mpz_class& m);
[[nodiscard]] std::vector<mpz_class> prime_factors(FactorizerFn f) const;
// Factoring methods return a factor of num.
[[nodiscard]] mpz_class naive() const;
[[nodiscard]] mpz_class pollard() const;
private:
mpz_class num;
static std::vector<mpz_class> factors(FactorizerFn f, const mpz_class& n);
static mpz_class big_power(unsigned long base, unsigned long exp);
};
#endif //FACTOR_FACTORER_H