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What is "Σ-Math Calculator"?

Σ-Math Calculator is a math site that offer you online math calculators to help you to solve algebra exercises with a step-by-step explanation and an user-friendly interface ;)

In Evidence

PowerMod Calculator


There are several ways to compute abmodn. The most efficient method consists of:
Step 1) divide the exponent b into powers of 2 by writing it in binary, obtaining b=(dk1,dk2,...,d1,d0).
Step 2)... (click here)

GCD Calculator: Euclidean Algorithm


a and b are two integers, with 0b<a.
Step 1) if b=0 then GCD(a,b)=0.
Step 2) if b0 then you proceed with the successive divisions: ... (click here)