Even the Smartest Mathematicians Can't Solve the Collatz Conjecture
The Collatz conjecture can be worked on by 9-year-old math whizzes, but it's flummoxed the greatest minds of the past century. Will it ever be solved?
Paul Erdos Lothar Collatz Terence Tao Breakthroughs With The Hailstone Sequence University Of Berlin Collatz Conjecture
Source: howstuffworks.com