Instagram's latest user numbers are sure to make Facebook a proud new papa.
More than 50 million people are now using the popular site and its mobile apps to upload and share photos with fellow users and friends. Instagram didn't officially release the news. The company's Press Center Web page still lists the number of registered users at 30 million.
Instead, the latest figure was obtained by tapping into the site's application programming interface, according to CNET sister site ZDNet. Instagram is apparently adding around 5 million new users per week.
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