San Fransisco- 2 billion people are regularly using Facebook, the world’s largest social media network. .

Chief Executive Mark Zuckerberg disclosed the number to his followers in a Facebook post. “It’s an honor to be on this journey with you,” he wrote.

The user base is bigger than the population of any single country, and of six of the seven continents. It represents more than a quarter of the world’s 7.5 billion people.

The social network’s user population dwarfs that of similar companies. Twitter Inc (TWTR.N) reported in April monthly active users of 328 million, while Snap Inc’s (SNAP.N) Snapchat had 166 million daily users at the end of the first quarter.

Facebook had 1.94 billion people using its service monthly as of March 31, an increase of 17 percent from a year earlier. It reached 1 billion in October 2012.

The company, which Zuckerberg started in 2004 in his college dorm room, uses its huge size advantage to lure advertisers, offering them highly targeted marketing capabilities based on its data about users.

The number of advertisers topped 5 million in April, the company said.