What an incredible waste of computer time and function. To prove what is already known as a irrational number, meaning it cannot be written as the ratio of two integers. The decimal representation of π is non-repeating.
The number can’t be written as a common fraction, though 22/7 approximates it. The decimal representation has not-— even in this ridiculous expense of time and utilization, been established as a permanently repeating pattern throughout any derivation.
It’s not a waste. It’s a test of top-end computing equipment and techniques. If you’re going to spend millions on a system for big-money or life-impacting computations, you want to know it can at least handle something as relatively trivial as computing trillions of digits of pi.