This NYT story describes the origin of the Panama Papers with an anonymous email sent to Bastian Obermayer of the German newspaper Suddeutsche Zeitung- "Interested in data?" Obermayer, who had done previous investigations into money laundering and tax evasion, replied "Very interested." When the 5 member team of the Suddeutsche Zeitung could not cope with the torrent of data coming in, the International Commission of Investigative Journalism organized an effort that brought in about 400 journalists from 100 news companies in 80 countries to tackle the trove of data. This process went on for one year till the data was released in April 2016. In the first 2 months when Obermayer worked with a colleague, the two exchanged emails in the middle of the night at late hours, saying it was taking all their time.