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.
log2(1 - 115792089210356248762697446949407573529996955224135760342422259061068512044369 / 2^256)
log2(1 - 115792089210356248762697446949407573529996955224135760342422259061068512044369 / 2^256)
Natural Language
Math Input
Extended Keyboard