July 27, 2012

Shakuntala Devi - Human Computer


Shakuntala Devi was born on November 4, 1939 in Bangalore, India.
In Dallas she competed with a computer to see who give the cube root of 188138517 faster, she won.

In 1977 At university of USA she was asked to give mentally the 23rd root of 916748676920039 158098660927585 380162483106680 144308622407126 51642793465704086709659 327920576748080 679002278301635 492485238033574 531693511190359 657754734007568 18688305 620821016129132 845564895780158 806771 (201-digit number).

She answered in 50seconds. The answer is 546372891. It took a UNIVAC 1108 computer, full one minute and 2 seconds (10 seconds more) to confirm that she was right after it was fed with 13000 instructions.

On June 18, 1980 she demonstrated the multiplication of two 13-digit numbers 7,686,369,774,8 70 x 2,465,099,745,7 79 picked at random by the Computer Department of Imperial College, London. She answered the question in 28 seconds.

Her correct answer was 18,947,668,177, 995,426,462,773 ,730. This event is mentioned on page 26 of the 1995 Guinness Book of Records.
Now she is known to be Human Computer.

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