Bip39 words https://atavi.com/share/xbwf7vz16jgof Let us think It'll be 10x speedier as opposed to GFX card above so approximately 2,4M hashes/s. A typical attacker will very own a handful of these types of specialised devices. For words that have only three letters, there isn't a 4th letter. By way of example https://thebookpage.com/story6034673/bip39gen-bip39-npm-no-further-a-mystery-https-cutt-ly-uryc5rw7