Blockchains explained visually (part 1 of 2) 9 years ago
"it's quite customary to represent hashes in hexadecimal notation (that is, using 0-9 and a-z) - that's what we'll use in this article." -- hexadecimal is 0-9 and a-f
[ my public key: https://keybase.io/caylor; my proof: https://keybase.io/caylor/sigs/7SWqBwjgITyv8oqXdLGwunkxLQ95w9M1IR8C3x9n-08 ] hnchat:RCNZFF6CvlHTXQs7hsbp