Problem 1750. Modular multiplicative inverse
Modular multiplicative inverse is used for The Chinese Remainder Theorem and RSA algorithm. You can visit Wikipedia.
Normal Modulus
X = M (mod Y)
You can solve that with M = mod(X,Y)
Inverse Modulus
X.B = M (mod Y)
given X,M,Y calculate B
B = inverse_modulus(X,M,Y)
Solution Stats
Problem Comments
-
1 Comment
The inverse modulus would be to find X such that mod(X,Y) = M where M and Y are known (or X === M (mod Y)); this is the chinese remainder theorem which is generalized for any number of Y's and M's when all have the same X and the GCD of all Y = 1 (greatest common divisor). The author is actually requesting Y*Z + M = X*B, which is not the same thing, or the inverse modulus.
Solution Comments
Show commentsProblem Recent Solvers21
Suggested Problems
-
Find the sum of all the numbers of the input vector
46998 Solvers
-
429 Solvers
-
Getting the indices from a vector
8942 Solvers
-
445 Solvers
-
Convert to Binary Coded Decimal
126 Solvers
More from this Author92
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!