Bip39 Bitcoin Improvement Proposal 39 A BIP39 mnemonic sentence is really a set of words (most often 12 or 24) that we will interact with a lot more productively than other characters that aren't words (bits and numbers as well as the like). BIP39's purpose in introducing the use of https://www.youtube.com/channel/UCUpxfyTJ0fb78SQ55hU6OCw