**Bjorn Mikhail Poonen** is a mathematician, four-time Putnam Competition winner and currently the Claude Shannon Professor of Mathematics at MIT. His research is primarily in number theory and algebraic geometry, but he has occasionally published in other subjects such as probability and computer science. He has edited two books, and his research articles have been cited by approximately 500 distinct authors. He is the founding managing editor of the journal *Algebra & Number Theory*, and serves also on the editorial boards of *Involve* and the *A K Peters Research Notes in Mathematics* book series.

Poonen is a 1985 alumnus of Winchester High School in Winchester, Massachusetts. In 1989, Poonen graduated from Harvard with an A.B. in Mathematics and Physics, *summa cum laude*. He then studied under Kenneth Alan Ribet at the University of California, Berkeley, completing a Ph.D. there in 1994.

Poonen held postdoctoral positions at MSRI and Princeton University and served on the faculty of the University of California, Berkeley from 1997 to 2008, before moving to MIT. He has also held visiting positions at the Isaac Newton Institute (1998 and 2005), the Université Paris-Sud (2001), Harvard University (2007), and MIT (2007).

Fellow of the American Mathematical Society, 2012.
American Academy of Arts and Sciences: elected in 2012
Chauvenet Prize: the 2011 winner, for his article "Undecidability in number theory"
Miller Research Professorship - University of California Berkeley.
David and Lucile Packard Fellowship
Sloan Research Fellowship
William Lowell Putnam Mathematical Competition: winner in 1985, 1986, 1987, and 1988 (the only other four-time winners since 1938 are Don Coppersmith, Arthur Rubin, Ravi D. Vakil, Gabriel Carroll, Reid W. Barton, Daniel Kane and Brian R. Lawrence).
International Mathematical Olympiad: silver medalist in 1985.
American High School Mathematics Examination: only participant (out of 380,000) to receive a perfect score in 1985.
He co-authored a paper entitled "How to spread rumors fast".
His Erdős-Bacon number is 5: he co-authored scholarly articles with Andrew Granville, Wen-Ch'ing Winnie Li, Andrew Odlyzko, and Peter Winkler, all of whom have Erdős number 1; and he appeared in the documentary *Julia Robinson and Hilbert's Tenth Problem* narrated by Danica McKellar, who has Bacon number 2.
Poonen proposed the Big Mouth Conjecture in April 2014, proving it minutes later during a faculty talent show at MIT.