Twitter Says It Has 140 Million Users

Twitter celebrated its sixth birthday on Wednesday by dropping an impressive stat: The network now claims 140 million active users.
In a blog post feting the event, the company also boasted that its network sees 340 million tweets a day. "That's more than 1 billion every three days," the post reads. "However concisely, it turns out there's plenty to say."
The post also includes a photo of co-founder Jack Dorsey's sketch of the service he envisioned (see picture)
The 140 million figure is a 40% increase over the 100 million active users Twitter CEO Dick Costolo claimed in September. At the time, Costolo said those 100 million users log in at least once a month and 50 million go on every day. Twitter's post didn't disclose how many of the 140 million are daily active users.
Costolo also said at the time that 55 million users log on to Twitter from their phone or tablet every month. Twitter.com was also seeing 400 million visitors a month, up from 250 million at the beginning of 2011, Costolo said in September.
With 140 million active users, Twitter is just behind LinkedIn, which claimed 150 million members in February, and ahead of Google+'s 90 million (although at least one analyst says Google's social network has 100 million users).
Facebook, meanwhile, revealed in February that it now has 845 million users on its network.
10 Tweets That Rocked the Twitter-verse
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The Hudson Plane Landing
When a commercial flight was forced to make an emergency landing in the Hudson River, Twitter -- with the help of image service Twitpic -- told the story.
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Kenneth Cole's #Cairo Blunder
During a rash of riots in the Middle East and North Africa, Twitter played a role in protesters' fight for democracy. But a crass tweet from Kenneth Cole stands out as a hallmark of insensitivity.
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Bieber Tweets "His" Digits
In what was called "kind of a jerk move," teen idol Justin Bieber tweeted the phone number of an invasive fan as if it were his own. Said fan's phone was ringing off the hook for hours and received at least 26,000 text messages.
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Marriage Proposal
Social media proposals are a whole thing unto themselves these days, but the trend probably started with this sweet tweet.
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Ice: The Final Frontier
Tweets from space are all the rage. The landmark discovery of ice on Mars caused quite the stir on Twitter.
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"Arrested"
This single-word tweet ended up being a lifesaver for UC Berkeley journalism student James Buck.
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Jack's First Tweet ...
Twitter co-founder Jack Dorsey's first tweet -- the inauspicious blurb that started it all back in 2006.
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... and Oprah's First Tweet
When the talk show host discussed Twitter with Biz Stone and Ev Williams, she brought mainstream attention to a rather geek-centric web app. Twitter adoption spiked as a consequence.
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Tweets From Space: Now In Real-Time!
The first live and real-time tweet from space came from the International Space Station in early 2010.
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The Abbottabad Tweeter
Without knowing exactly what was going on, Twitter user @ReallyVirtual started tweeting about a helicopter crash in his town. The town happened to be Abbottabad, and the crash happened to be one event in the raid that led to Osama bin Laden's death.



