New spreadsheet out—12th and 24th word generator when you *randomly!*, manually select the first seed phrase words. This spreadsheet gives you all the possible last check words

Interesting aspects:

• In a 12-word seed phrase for first 11 words there are 128 possible 12th words that will work as a check word

• In a 24-word seed phrase for the first 23 words there are only 8 possible 24th words that will work as the check word

There are also some interesting diminishing randomness probability due to this aspect but won’t get into it here as it’s been discussed elsewhere

This is a tool for learning and fun—take extra care everything is offline whenever working with private keys. The spreadsheet does not have macros or array formulas so there’s that

You can find the spreadsheet near the bottom of the https://www.modulo.network/spreadsheets page of the modulo website

#bitcoin #privatekey #seedphrase #excel #%