Gert Mittring (born 26 May 1966 [1] in Stuttgart)[ citation needed ] is a German mental calculator. He was inspired by the late Wim Klein. [2] He has competed in the MSO mental calculation event every year since 2004, failing to win the gold medal outright on only four occasions. [3] He has held numerous world records for mental calculation, such as calculating the 89247th root of a 1000000 digit number. [4] He has doctorates in statistics and mathematics education, and is a member of the Intelligence Research Committee of Intertel. [5] [6] Mittring is said to have been poor in mathematics during his school years. [7] He has written several books on mental calculation. [8] [9]