Gregory Chudnovsky is a mathematician with an interest in number theory. Gregory works closely with his brother, David Chudnovsky, who is also a mathematician. The Chudnovsky Brothers are mathematicians known for their wide-ranging mathematical abilities, their home-built supercomputers, and their close working relationship. A 1992 article in The New Yorker quoted several mathematicians' opinions that Gregory Chudnovsky has one of the top mathematical minds alive today. David Chudnovsky works closely with and assists his brother Gregory, who suffers from Myasthenia Gravis, a disorder of neuromuscular transmission leading to fluctuating weakness and fatigue. The Chudnovsky Brothers have held records, at different times, for computing Pi to over two billion digits a feat accomplished in the early 1990s on a supercomputer they built in their Brooklyn apartment.