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Avoiding expensive calculations in Python IRC bot
>>> acos(5e100)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: math domain error

>>> float(10) ** float(100) ** float(100) ** float(1000)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OverflowError: (34, 'Numerical result out of range')
>>> float(5e500) * float(4e1000)
inf

import sys

def factorial(n):
    fact = 1
    while (n > 0):
        fact = float(fact) * float(n)
        n -= float(1)
        if float(fact) > sys.float_info.max:
            return "Too big"
    return str(fact)

print factorial(50e500)