Facebook has officially reached the 1 billion monthly active user milestone, a great round number to trumpet for a company that’s been struggling through some post-IPO blues. The achievement was expected at some point, but is still impressive in its own right.

Facebook, which launched in 2004, took four years to get to its first 100 million users and hit 500 million users in 2010. Now it has 600 million users just on mobile. In those eight years, Facebook users have generated:

• More than 1.13 trillion likes
• 140.3 billion friend connections
• 219 billion photos uploaded

“Helping a billion people connect is amazing, humbling and by far the thing I am most proud of in my life,” said co-founder and CEO Mark Zuckerberg in a blog post. “I am committed to working every day to make Facebook better for you, and hopefully together one day we will be able to…