Twitter went public Thursday, and its stock soared 73 percent from its initial offering price. Here are five random facts about Twitter.
1) The first tweet was by co-founder Jack Dorsey, who wrote "just setting up my twttr" on March 21, 2006.
2) Katy Perry has the most Twitter followers, at nearly 46.8 million, followed by Justin Bieber, 46.7 million, and Lady Gaga, 40.4 million.
3) The most popular tweet, shared more than 400,000 times within a few hours, was Barack Obama's "Four more years," tweeted upon his re-election in November 2012.
4) Some 70 percent of users are outside the U.S., and 40 percent of users are lurkers who never tweet.
5) The user @Jesus, who was almost 575,000 followers, describes himself as "Carpenter, Healer, God."