Over 2.2 billion usernames & unique passwords leaked online

Hackers have shared a huge collection of usernames and passwords including some 773 million unique accounts and more than 21 million different passwords, named as 'Collection #1'. Soon they also released more than 2.2 billion unique usernames and passwords naming it as 'Collection #2-5'. It is widely circulated among the hacker underground & distributed in hacker forums. More private information of users has been exposed.