(Reuters) – Computer hackers posted online usernames and partial phone numbers of 4.6 million users of mobile photo-sharing service Snapchat, media reports said on Wednesday. A website called SnapchatDB.info made the information available for download, according to tech news site TechCrunch. In a statement to TecCrunch, SnapchatDB said that it got the information through a recently identified and patched Snapchat exploit and that it was making the data available in an effort to convince the messaging app to beef up its security.