After cracking the "sum of cubes" puzzle for 42, researchers discover a new solution for 3 The 21-digit solution to the decades-old problem suggests many more solutions exist.

After cracking the 'sum of cubes' puzzle for 42, mathematicians discover a new solution for 3.

After years of work, there was only one number left below 100 that hadn't been proven to be the sum of three cubes. A million+ hours of worldwide supercomputer time later, even mighty 42 has fallen.