[math-fun] 1.24 Trillion digits of pi
http://www.guardian.co.uk/worldlatest/story/0,1280,-2223732,00.html Pi Value Calculation Earns Record Friday December 6, 2002 7:20 AM TOKYO (AP) - A team of researchers at a leading national university have set a world record by calculating the value of pi to 1.24 trillion places, one of the researchers said Friday. Professor Yasumasa Kanada and nine other researchers at the Information Technology Center at Tokyo University calculated the value for pi with a Hitachi supercomputer over 400 hours in September, project team member Makoto Kudo said. The new calculation is more than six times the number of places in the record currently recognized by Guinness World Records - 206.158 billion places - which Kanada also helped calculate in 1999. Kanada's team spent five years designing the program used in the September experiment, Kudo said. The Hitachi supercomputer is capable of 2 trillion calculations per second, or twice as fast as the one used for the current Guinness record calculation.
Apart from * Richard Schroeppel <rcs@CS.Arizona.EDU> [Dec 07. 2002 01:42]:
http://www.guardian.co.uk/worldlatest/story/0,1280,-2223732,00.html
there seems to be absolutely no information about the computation. ? any pointer to useful info ? all the best, jj -- p=2^q-1 prime <== q>2, cosh(2^(q-2)*log(2+sqrt(3)))%p=0 Life is hard and then you die.
I have written a 5-page note that contains all of the details that Kanada has made available so far, plus some background on methods that have been used through the years for computing pi. The note is available online at (take your pick): http://www.nersc.gov/~dhbailey/dhbpapers/dhb-kanada.tex http://www.nersc.gov/~dhbailey/dhbpapers/dhb-kanada.ps http://www.nersc.gov/~dhbailey/dhbpapers/dhb-kanada.pdf Cheers, David H. Bailey david@dhbailey.com * Richard Schroeppel <rcs@CS.Arizona.EDU> [Dec 07. 2002 01:42]:
http://www.guardian.co.uk/worldlatest/story/0,1280,-2223732,00.html
there seems to be absolutely no information about the computation.
participants (3)
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David H Bailey -
Joerg Arndt -
Richard Schroeppel