In January 2019, a large collection of credential stuffing lists (combinations of email addresses and passwords used to hijack accounts on other services) was discovered being distributed on a popular hacking forum. The data contained almost 2.7 billion records including 773 million unique email addresses alongside passwords those addresses had used on other breached services. Full details on the incident and how to search the breached passwords are provided in the blog post The 773 Million Record "Collection #1" Data Breach.
It's come to my attention that someone has posted a fake or false database calling it Collection #1. He said it's a different base but includes the Collection #1. That is untrue. Collection #1 comes in a 1TB cloud that troy hasn't seen. Here I present to you The real Collection #1 + More: (These were all included in original dump, troy only got 1 link rather than all)