The archive has been made available for download via BitTorrent as far back as early 2017. There are over 1.4 billion of them in total. Each account name is in the form of an email address, and all passwords have been cracked and are in plain text. This data comes from Yahoo, Target, Facebook, Hotmail, Twitter, MySpace, hacked PHPBB instances, and many, many more places. I recently stumbled upon a large collection of account names and passwords that have been harvested from the various data breaches over the past 10 or so years.