Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
log_2((10%5E8%20%2B%2010%5E6)%20choose%2010%5E6)%20/%202%5E23
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random