It would be a LOT of work
and I know of no library that is comprehensive.
Best not to do any rather than appear stupid.
Besides, the value of "validation" is limited - its not like a little set of heuristics is actually gonna guarantee that the number actually WORKS or anything.
I figure you're no worse off.
"Whenever you find you are on the side of the majority, it is time to pause and reflect" --Mark Twain
"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." --Albert Einstein
"This is still a dangerous world. It's a world of madmen and uncertainty and potential mental losses." --George W. Bush