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How to use Karatsuba algorithm to calculate product of two 64 digit numbers such that only single digit numbers take part in multiplication ?

Mayur Choudhary
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    I am voting to close this question, because it's too broad...you need to be more specific, like, what have you tried, the programming language that you are using, you environment, etc. – Hackerman Dec 23 '16 at 14:41
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    Welcome to Stack Overflow. This StackExchange site is focused on programming. Your question would be more on topic on the Mathematics site or MathOverflow. – BenH Dec 23 '16 at 14:42
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    The Karatsuba algorithm lets you multiply N-digit numbers using 2N-digit addition and N/2-digit multiplication. You will need to write a function for 128-digit addition, and your multiplication function should call itself recursively to do the smaller multiplications. – Matt Timmermans Dec 23 '16 at 15:35

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I think you posted this after going through Tim Roughgarden's course. What he actually meant was that you should multiply only a single digit to another single digit at a time, rather than use the computer to multiply multiple digits for you. In other words, multiply as if a human does it.

kosmos
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