Bip39 Checksum. You'd then do a primary recovery that has a command like the one under. (This command uses a sample wallet file bunlded with BTCRecover) BIP39 specifies a list of 2048 words from which the mnemonic phrase is picked out. Every word signifies a quantity in the binary sequence, https://hubwebsites.com/story20342809/bip39-words-https-linktr-ee-bip39-bip39-words-secrets