# Check if Large Float is Even or Odd

## Issue

I have tried using the modulo operator for small floats and it works perfectly fine.
For example: `5 % 2` returns `1`.

But for other large floats that are read as exponential in python it just returns `0` every time even if the number is odd.
Like this:

`295147905179352825855 % 2` returns `0` even though that number is clearly odd.

Is there anything I can do to check large floats without python reading it as exponential?

## Solution

What you said is not true. `295147905179352825855 % 2` should work because Python does arbitrary precision math on integers. There’s no floating-point values in your question

OTOH if you use a float like `295147905179352825855.0` then it obviously won’t work because on most modern platforms Python uses IEEE-754 binary64 format which has only 53 bits of precision and can’t store values such as `295147905179352825855.0`. The closest value is `295147905179352825856.0` which is clearly an even number

``````>>> 295147905179352825855 % 2
1
>>> 295147905179352825855.0 % 2
0.0
>>> format(295147905179352825855.0, '.20f')
'295147905179352825856.00000000000000000000'
>>> 295147905179352825856.0 == 295147905179352825855.0
True
``````