This has been listed on the wiki for awhile. Still waiting for people to attempt to cause a double precision floating point overflow with this though.
(and maybe brick their console in the process)

Its somewhere along the lines of 1.8 * 10^306 or something

Cause you know. hitting for 4,000,000 damage is no where as cool as hitting for NaN damage.

I do none of the above.

Cheers