World Record Academy
 World Record registration
 Book of World Records
 World Record Certificate
     World Record List
 Amazing Feats world records
 Arts world records
 Biggest world records
 Business world records
 Children world records
 Christmas world records 
 Collections world records
 Entertainement world records
 Fishing world records
 Food world records
 Drinks world records
 Games world records
 Hobbies world records
 Human Body world records
 Internet world records
 Mass Participation
 Modern Society
 Nature world records
 New Year world records
 Science world records
 Smallest world records
 Sports world records
 Stunts world records
 Strength world records
 Technology world records
 Thanksgiving world records
 Travel world records 
 Transport world records
 Youngest world records
 Wedding world records
 Terms of Use

      Wednesday, September 1, 2010          
   Most digits of pi calculated - Shigeru Kondo and Alexander Yee set world record
  TOKYO, Japan -- Shigeru Kondo, a Japanese systems engineer and Alexander J. Yee, an American computer science student, have calculated the value of pi to five trillion digits -
setting the new world record for the Most digits of pi calculated.               

   Photo: Shigeru Kondo, a 55-year-old resident of Iida and a company employee in Nagano Prefecture, assembled a computer with 32 terabytes of hard-drive capacity and used an application made by Alexander Yee, a 22-year-old student at a US graduate school to calculate the the value of pi to five trillion digits.
   (enlarge photo)

   "Alexander provided software and I was in charge of hardware. We couldn't have achieved the results without either of us," Kondo said, adding that the two men worked together while communicating by email.

    Link: more on their methodology here

  Shigeru Kondo, a 55-year-old systems engineer for a food company based in northern Japan, easily surpassed the previous record of 2.7 trillion digits, set late last year by a French engineer.

    Pi, the ratio of a circle's circumference to its diameter, starts with 3.14159 in a string whose digits are believed to never repeat or end.

    Ten decimal places of p are sufficient to give the circumference of the Earth to a fraction of an inch, and thirty decimal places would give the circumference of the visible universe to a quantity imperceptible to the most powerful microscope. Simon Newcomb (1835-1909)

    It took 90 days to calculate pi at Kondo's home using a desktop computer with 20 external hard disks. It ran on the operating system Windows Server 2008R2 and used powerful Intel microprocessors; it has a hard-drive capacity of 32 terabytes. Verification took 64 hours.

    (enlarge photo)

    Kondo built the computer by himself, procuring parts from local electronics shops and via the Internet. "I don't really want to say how much it cost me as my family may hear it... it's about 18,000 dollars," he told AFP by telephone.

    The mammoth calculation nearly came to grief on more than one occasion, Mr Kondo said, including one morning when his daughter tripped a circuit breaker when she turned a hair dryer on. The project was saved when the computer switched to an emergency 10-minute back-up power source.

     Mr Kondo was also forced to remove casings from the computer and blow cool air onto the machine with fans as the temperature in his home rose to 40 degrees in the hottest Japanese summer since 1946.

    (enlarge photo)

    It was midnight in Japan when the computer reached five trillion decimal places. "I was alone in the room at the moment... I know this is nothing but self satisfaction," he said. His mother and wife who live with him were sleeping at that time and later showed "no particular feelings" despite his sense of achievement, he said.    

   The previous Guinness World Record was set earlier this year by Fabrice Bellard, who calculated the value of pi to 2.7 trillion digits.

   Subscribe to our RSS News feed   to receive updates. 

   Related world records
   Most perfect prawn - world record set by CSIRO

  First synthetic life form - J. Craig Venter Institute

  Biggest scientific project -The Large Hadron Collider Project

  Largest periodic table of elements - Fossil Ridge students

   Most successful piles surgeries - Sudershan Chugh

   Most efficient bacteria test - Mobidiag

  Longest Pi Chain - Qatar International School

   Longest model of a DNA gene - Huddersfield University

   Longest Scanned Document - Truper scanner

   Highest efficient solar-to-grid convertor - SES

  Fastest Storage - exas Memory Systems

  Fastest road-legal BMW - G-Power

  Darkest material - Rensselaer Polytechnic Institute and Rice University

   Lowest power chipset - Silicon Line

   Shortest Chemical Bond Between Metals - UD researchers

    Wednesday, September 1, 2010

Bookmark and Share  
    [World Record Certificate



  First synthetic life form-J. Craig Venter Institute

      Biggest scientific project-The LHC Project

      Smallest Waterlily - Nymphaea thermarum

      Strongest artificially generated tornado