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Directory.io first of all does not contain all private keys - it's more of a joke. Anyway, if a brain wallet has a weak password, you have quite a good chance

Directory.io first of all does not contain all private keys - it's more of a joke. Anyway, if a brain wallet has a weak password, you have quite a good chance of cracking it easily. But you have to know that it's a brain wallet. But using a brain wallet is just silly. Also, don't forget cracking private keys using weak signatures, although good luck finding someone who has a wallet and a weak signature... http://www.nilsschneider.net/2013/01/28/recovering-bitcoin-private-keys.html http://www.nilsschneider.net/2013/01/28/recovering-bitcoin-p... EDITED - I didn't read the post correctly, my apologies.

enscr 13y ago
Can't vouch for what's on directory.io but it goes as far as http://directory.io/904625697166532776746648320380374280100293470930272690489102837043110636674 http://directory.io/9046256971665327767466483203803742801002... & beyond... have you tried paging through? https://en.bitcoin.it/wiki/Private_key https://en.bitcoin.it/wiki/Private_key "In Bitcoin, a private key is a 256-bit number, which can be represented one of several ways. Here is a private key in hexadecimal..." Edit : The bitcoin private key being a number was in response to your redacted comment.
palkeo 13y ago
Of course directory.io is a joke :) A private key IS a number : https://en.bitcoin.it/wiki/Private_key https://en.bitcoin.it/wiki/Private_key The one you shown was just encoded in base58 !
- LyndsySimon 13y ago
  To be really precise, it's encoded base58check.