A math question for /sci/

I coded a calculator that does floating point math. The exponent field of this calculator's floating point representation can handle values between 99999 and -99999. What sort of problems can /sci/ propose that would cause an overflow of this field? Are there any problems in real world physics that would exceed these orders of magnitude? I mean, wouldn't the gravitational force of attraction between two protons separated by the diameter of the Milky Way fit into this range?

Come on /sci/, you can do better than that. There have got to be equations in advanced physics that build up orders of magnitude faster than the basic physics I know.

Force between two electrons one Plank length apart:
charge 10 ^ -19 C
distance 10 ^ -35 m
k 10 ^ 9 N * m^2 / C^2
that would be about 10 ^ 41 N