well the math is above me lol, but couldn't your 'super-smart' be a little smarter and instead of doing the math himself, be allocated to to the of task simply breaking it up into easier micro chunks of math to be distributed amongst an army of mental sweatshop laborers and then supersmart guy checks over for errors and does the final math on it?  assuming a low amount of errors, it would reduce the time significantly would it not? In some countries right just paying the workers with food (some economical high protein stuff like peanut butter!) would be incentive enough.

note i'm am conscious of 3rd world war/global poverty issues and don't mean to be insensitive here, so please don't interpret as that.