I hadn't realised this before making it, but one interesting pattern is that the number in between twin primes is always abundant, if greater than 6. It's reas

I hadn't realised this before making it, but one interesting pattern is that the number in between twin primes is always abundant, if greater than 6. It's reasonably simple to prove using the fact that every twin prime pair except (3, 5) is of the form (6n − 1, 6n + 1).