A SAVVY brain and a perfect number formula was all it took for a maths whizz to win the lottery 14 TIMES - until his luck ran out. Desperate for cash, Romanian economist Stefan Mandel, now 84, found ...

Imagine a number made up of a vast string of ones: 1111111…111. Specifically, 136,279,841 ones in a row. If we stacked up that many sheets of paper, the resulting tower would stretch into the ...

John Voight receives funding from the Simons Foundation and is affiliated with the Number Theory Foundation. Imagine a number made up of a vast string of ones: 1111111…111. Specifically, 136,279,841 ...