Problem 46636. Montgomery Multiplication

Created by David Hill
Appears in Sequences & Series IV

Difficulty:Rate

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Multiply all elements of an input matrix (A) modulo N, given all elements are less than R (2^number of bits). Where gcd(R,N)=1 and N<R. Output the final result, P (in normal form) and all intermediate products (p) in Montgomery form (first product is just first element of matrix (A)*R modulo N).

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6 Solutions
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Last Solution submitted on Nov 11, 2022

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Dyuman Joshi on 1 Aug 2022

David, can you explain what do you mean by intermediate products?

cokakola on 11 Nov 2022

I had to create the needed elements of p, they did not exist es intermediate results. Well, they exist, but not in the right form.

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