Complex sentence: In 2013, Harald Helfgott proved Goldbach's weak conjecture; previous results had already shown it to be true for all odd numbers greater than e ^\\ approx 2\\ times 10 ^.
Split into simpler sentences: In 2013, Harald Helfgott proved Goldbach's weak conjecture for all odd numbers. Prior to his work, the best known result was its truth for all odd numbers greater than e ^\\ approx 2\\ times 10 ^.