Wikipedia turns 15 on Friday — and Wikipedian Ser Amantio di Nicolao is the reigning editing champ. He has made 1,530,839 edits, more than any other editor in the site's short but flourishing history. Over the years, he has seen Wikipedia evolve from an experiment in crowdsourcing into a panacea of human knowledge.

Wikipedia has more than 257 million registered users. About 250 thousand accounts are created every month, but only about 115,000 users have made edits in the last 30 days. The most tenacious of all those editors is master Wikipedian Steven Pruitt, a 31-year-old government contractor, who lives with his parents in the suburbs of Mount Vernon, Virginia, just outside of Washington, D.C. Pruitt, who edits under the user name Ser Amantio di Nicolao, admits that in some ways, he fits the Wikipedian stereotype. (Wikipedia editors are overwhelming male with a 2011 survey revealing that men comprise 90% of all editors.) "I'm young, male, degree-ed and a professional. And I'm a bit slovenly in my habits, which I think is part of what people imagine," Pruitt told Vocativ via email in his first interview.

Pruitt is also a bit of a Luddite who prefers to work on paper at his job. Outside of Wikipedia, his main passion is his choir, the Capitol Hill Chorale. His Wikipedia user name stems from his love for opera—Ser Amantio di Nicolao is a minor role in Giacomo Puccini's opera Gianni Schicchi. The only time he likes to interact with technology is when he sits down at the same desk he's had since middle school, inches away from his family's Hewlett-Packard computer screen, making minor contribution after minor contribution to the world's largest encyclopedia.