Quote from: Aikido on Today at 10:15:13 AM

13 word can be absolutely anything? Not from the BIP39 list ?

Not only not from the BIP39 list, but it doesn't even have to be a word. You can use an entire phrase or sentence (but don't choose a famous quote or song lyric, since you decrease your security by doing so), you can use numbers and characters, you could use something that looks like this: ]$wQ^;g2q94@$HRY

Just make sure you write down your passphrase on paper the same as you (hopefully!) did with your seed phrase when you first set it up, and keep it safe and secure. You want to store your seed phrase and your passphrase back ups separately, so if one is compromised by an attacker they still cannot steal your coins.

Quote from: ETFbitcoin on Today at 10:57:38 AM

Correct, i just tried 500+ character as 13th word and it works.

I did this a few a years ago:

Quote from: o_e_l_e_o on October 09, 2019, 01:04:30 PM

As a quick test, I just created and then recovered an Electrum wallet with a passphrase of 20,000 characters.

Perhaps just a touch excessive. Tongue