Jan van Koningsveld

Jan van Koningsveld (born 1969 in Emden) is a mental calculator.

In addition, he finished second in the overall rankings of 2004, 2006 and 2008, fifth in 2010 and third in 2012, where he won the championship for cube roots.

In 2022 he made his comeback, winning the silver medal in Calendar Calculations.

During the first Memoriad 2008, the Olympiad for Mental Calculation and Memory held in Istanbul, Turkey, Jan van Koningsveld won the gold medals in the categories Multiplication as well as Calendar Calculation.

Jan van Koningsveld also held the world record for multiplying two five-digit numbers.