After months of speculation, one of the most hyped and anticipated IPOs comes to fruition: Today, Facebook went public and started trading on the Nasdaq stock exchange. The company, which is valued at $104 billion, had humble beginnings in a Harvard dorm but has grown into the world's largest social network.
Here's a look at 15 Facebook fun facts and stats about that may surprise you.
1. Facebook users upload more than 250 million photos to the site each day. Sean Parker convinced Mark Zuckerberg to add photo sharing, which is now the site's most popular feature. Zuckerberg, at first, was hesitant.
2. It's no surprise that Facebook collects a lot of information from its 900-million-plus users. But last year, in photos and videos alone, it stored upwards of 100 petabytes—that's double all written works of humankind in all languages.
3. Do you know who friended you? Most do: Eighty percent of friend requests are accepted.
4. A Facebook user who uses the site multiple times per day is 43 percent more likely than other internet users and more than three times as likely as non-internet users to feel that most people can be trusted.
5. Last year, Facebook made $1 billion on a total revenue of $3.7 billion. Compare that to 2010, during which Facebook made $606 million.
6. Zuckerberg's 28 percent share in the company means he'll be worth more than $29 billion.
7. In 2011, he earned $1.5 million in total compensation on a salary of $500,000. This year, Zuckerberg will earn a base salary of $1.
8. Part of Zuckerberg's 2011 compensation was nearly $700,000 in chartered jet services as part of a "comprehensive security program.
9. The biggest chunk of change from today's IPO will go to the 3,200-plus engineers, developers and more, who have evolved the company and kept it running. Facebook's employees will reportedly receive 30 percent of the $104 billion valuation, sharing about $31billion.
10. Compared with other internet users, and users of other social networking platforms, a Facebook user who uses the site multiple times per day is an additional two and half times more likely to attend a political rally or meeting, 57% more likely to persuade someone on their vote, and 43% more likely to have said they would vote.
11. In Facebook's IPO filing, Zuckerberg is listed as the inventor or co-inventor on at least seven of the issued patents. But the company doesn't insist that it invent everything: Last year, Facebook spent $51 million acquiring patents, which is up from $33 million in 2010.
12. At two degrees of separation (friends of friends), Facebook users on average can reach 156,000 other Facebook users.
[Want more tips, tricks and details on Facebook? Check out CIO.com's Facebook Bible.]
13. A majority of social network site users—58 percent—restrict access to their profiles, and women are significantly more likely to choose private settings.
14. Women also average 21 updates to their Facebook status per month, while men average just six.
15. Last year, Facebook spent $388 million on research and development. That's up from $144 million in 2010 and $87 million in 2009.
Kristin Burnham covers consumer technology, social networking and enterprise collaboration for CIO.com. Follow Kristin on Twitter @kmburnham. Follow everything from CIO.com on Twitter @CIOonline and on Facebook. Email Kristin at firstname.lastname@example.org