> So far I've only read the introduction and it doesn't obviously involve any advanced mathematics that I'm unfamiliar with so I could perhaps attempt an implementation.

This is a bad sign for the paper. The prior cases of solving big foundational problems I'm aware of all introduce substantial new math. So much so that the actual problem is something of an afterthought. Wiles's proof of Fermat's last theorem is substantial.

It's not impossible that this is legitimate, but... it seems unlikely that P=NP has evaded proof for so long if the solution were straightforward. There are also a LOT of plausible-but-flawed proofs -- it's not unsolved for a lack of trying.