was a Japanese computer scientist most known for his numerous world records over the past three decades for calculating digits of
. He set the record 11 of the past 21 times.
Career
Kanada was a professor in the Department of Information Science at the
University of Tokyo
The University of Tokyo (, abbreviated as in Japanese and UTokyo in English) is a public research university in Bunkyō, Tokyo, Japan. Founded in 1877 as the nation's first modern university by the merger of several pre-westernisation era ins ...
in
Tokyo
Tokyo, officially the Tokyo Metropolis, is the capital of Japan, capital and List of cities in Japan, most populous city in Japan. With a population of over 14 million in the city proper in 2023, it is List of largest cities, one of the most ...
,
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
until 2015.
Pi records
From 2002 until 2009, Kanada held the world record calculating the number of digits in the decimal expansion of pi – exactly 1.2411 trillion digits.
The calculation took more than 600 hours on 64 nodes of a
HITACHI SR8000/MPP supercomputer
A supercomputer is a type of computer with a high level of performance as compared to a general-purpose computer. The performance of a supercomputer is commonly measured in floating-point operations per second (FLOPS) instead of million instruc ...
. Some of his competitors in recent years include
Jonathan and
Peter Borwein and the
Chudnovsky brothers
David Volfovich Chudnovsky (born January 22, 1947) and Gregory Volfovich Chudnovsky (born April 17, 1952) are American mathematicians and engineers known for their world-record mathematical calculations and developing the Chudnovsky algorithm us ...
.
See also
*
Chronology of computation of
References
External links
*
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1949 births
2020 deaths
20th-century Japanese mathematicians
21st-century Japanese mathematicians
People from Himeji, Hyōgo
Scientists from Hyōgo Prefecture
Pi-related people
Tohoku University alumni
Academic staff of the University of Tokyo
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