[Josde]

While that is true, I think the point that other users are trying to make is that wording it as "a complex mathematical problem being solved" makes it look like that work is doing something useful when it really is not.

[lottin]

It's worse than that, they're aren't solving anything at all. They're taking part in a lottery, in which participants have to guess a number, and the winner gets to update the ledger. Nobody is solving complex mathematical problems.

[wasabi991011]

Given y, solve for x in the equation f(x) = y

That's a valid use of the word "solve". It is obviously mathematical. It is complex, as we do not have a simple way to solve it.

I get it, words can have multiple meanings. It's fine to give a clarification on the specific use here, but then move on.

[WFHRenaissance]

They’re brute-forcing the solution to a mathematical puzzle.