Number cruncher

Dec 12 2007

The world's fastest human calculator has recorded the quickest ever time for mentally working out a 200-digit number, breaking his own record in the process.

Mathlete Alexis Lemaire, 27, found the answer to the 13th root to a random 200-digit number using nothing but brain power in 70.2 seconds, beating his previous record of 72.4.

Alexis correctly calculated an answer of 2,407,899,893,032,210 from the possibility of 393 trillion answers.