https://www.dw.com/en/murderer-solves-ancient-math-problem-and-finds-his-mission/a-53895884
https://www.popularmechanics.com/science/a32502357/inmate-math-discovery-prison-continued-fractions/
https://interestingengineering.com/can-you-solve-this-prison-inmates-viral-math-riddle
https://www.popularmechanics.com/science/math/a35520893/havens-math-horizons-problem/