prep-work/python/14-largest-prime-factor

Largest Prime Factor

Write a function that takes a number as input, and returns the largest prime factor of a given number. If the number is prime itself, then it's largest prime factor is itself.

largest_prime(15)  # 5
largest_prime(18)  # 3
largest_prime(19)  # 19
largest_prime(302) # 151