A man that has the synonym of "human computer", the world's fastest and mental arithmetic

It seems that a French man with a synonym of "human computer" solved 200 th digit number 13 th root in 72.438 seconds without using a calculator. He said that he updated his own world record.

It is a business that a man is unlikely to be able to manage very well.

Details are as follows.
French "Human Computer", World Record International News of 72.438 seconds with the mental arithmetic of the thirteenth root of the 200 digit figure: AFPBB News

According to this article, Alexis Lemaire, a 27-year-old French man with a synonym for "human computer", majoring in artificial intelligence in France, said at the New York Science Museum in New York a 200-digit number 13th power It seems he solved the root in 72.438 seconds without using a calculator and updated his world record of 77 seconds.

And this time, the thirteenth number of a certain number "2397 trillion 207.6 billion 679606701I solved it by mental arithmetic.

By the way, about the mental arithmetic method, "I use an artificial intelligence system in my head instead of a computer", and when I am mental arithmetically, the brain works at a tremendous speed, so I have to take medicine It is said that there are times when it can not be disabled.

Also, in addition to practicing every day indispensable every day to speed up the work of the head, he does not drink coffee or alcohol, he seems to have avoided diet rich in carbohydrates and lipids. In other words, if it does not go far if you give it up, does your head have better work?