A hacker has posted the phone numbers and sensitive account details of nearly 533 million Facebook users about a fifth of the social networking platform s entire user base including over 61 lakh Indian users which has been dumped on a public cybercrime forum. The leaked data includes Facebook ID numbers, profile names, email addresses, location information, gender details, job data, and other details. All 533,000,000 Facebook records were just leaked for free. This means that if you have a Facebook account, it is extremely likely the phone number used for the account was leaked, tweeted Alon Gal, CTO of security firm Hudson Rock.