mathutils

a collection of math-related functions

#MathUtils

a collection of math-related functions

npm install mathutils

###Currently available functions

#####isEven(n) / isOdd(n) Check if the bit for 2^0 is set. If it is, `n must be odd.

#####powermod(a, b, c) powermod is a way of computing (a ^ b) mod c without having to deal with giant numbers that would loose their precision.

#####isPrime(n) Returns if n is a prime. Extremely slow, but absolutely accurate.

#####fastIsPrime(n) Retuns if a n is a prime. Based upon Fermat's little theorem.

Note: Doesn't take care of carmichael primes, so you probably want to use this in combination with isPrime.

#####randomPrime(length) Returns a pseudo-random prime number (based on Math.random). length defaults to 3.

#####gcd(a, b) Returns the greatest common divisor of a and b. Based on Euclids algorithm

#####egcd(a, b) Computes the extended Euclidean algorithm. Returns an array [d, s, t].

gcd(a, b) = d = s * a + t * b

#####modularInverse(a, b) Returns the modular multiplicative inverse of a and b.

###TODO

  • write tests
  • add more documentation
  • learn how to breakdance