On 10 May 2002, he calculated the 13th root of a 100-digit number in 13.55 seconds, beating the record held by Willem Klein (88.8 seconds) and the somewhat less official record of Gert Mittring (39 seconds).
In this respect Dysart is unique among the documented calculators, among whom several–most notably Dutchman Wim Klein–multiplied large numbers by breaking them up into groups of two-digit numbers but never three-digit numbers.
Calvin Klein | Willem de Kooning | Willem Dafoe | Yves Klein | Naomi Klein | Willem Blaeu | Melanie Klein | Joe Klein | Willem Janszoon | Ralph Klein | Willem Mengelberg | Felix Klein | Calvin Klein (fashion designer) | Willem Roggeman | Herman Willem Daendels | Anne Klein | Allen Klein | Willem Drees | Willem-Alexander of the Netherlands | Lawrence Klein | Joel Klein | Hans-Joachim Klein | Willem van Otterloo | Willem Schouten | Willem Kloos | Willem Klein | Willem II (football club) | Willem II | Willem de Vlamingh | Willem Buiter |