Artemis: Optimize Prime Checking and Factorization Logic

[mike-turintech]

This pull request implements optimizations to the IsPrime and PrimeFactors methods in the Primes class. Key changes include:

1. Prime Checking Optimization: The loop in IsPrime now checks divisibility only up to the square root of n, significantly reducing the number of iterations needed to determine if a number is prime.

2. Enhanced Prime Factorization: The PrimeFactors method has been modified to handle repeated prime factors more effectively using a while loop. Additionally, a check for any remaining prime factor greater than 1 has been added to ensure completeness in factorization.

These improvements lead to better performance and efficiency when processing larger numbers.