how to multiplication large number using mpi?
Can you do it without MPI? Try that first.
You can use the Karatsuba Fast Multiplication algorithm for this purpose. We normally employ this algorithm for cryptographic systems, where we need to multiply large numbers in the range of several thousand digits. Please refer to Wikipedia for the algorithm. http://en.wikipedia.org/wiki/Multiplication_algorithm#Karatsuba_multiplication. You can also read this tutorial better understanding - http://www.mpi-inf.mpg.de/~mehlhorn/ftp/chapter2A-en.pdf
Following is a source code that I found after googling. It shows how MPI can be used to perform Karatsuba Multiplication Algorithm in parallel. The code appears in GnuPG as a MPI helper function. Here is the link of the post http://www.stillhq.com/gpg/source-1.0.3/mpi/mpih-mul.html
There are many other large number multiplication algorithms (source: Wikipedia) that you could use like
* Gauss's complex multiplication algorithm.
* Fourier transform methods.
* Linear time multiplication.
* Quarter square multiplier.
* Polynomial multiplication.
Edited 7 Years Ago
by tyrantbrian: n/a
I recently inherited a project that has been in production for a number of years. They want a new field added. Easy peasy - or so you would ...
i am creating an app with android studio and i'm using mySQL.and i want to implement friends feature in my app to enable users send and recieve friend requests, i ...
I am building a atm machine but havent actually coding it as yet, just the gui interface part i have done so far because i am doing something ...