English
Number theory
Notes on divisibility, prime numbers, congruences, and the deeper structures behind integer arithmetic. Each piece breaks down a specific theorem, identity, or technique — from Euclidean algorithm fundamentals to modular arithmetic and its applications. The focus is on clear reasoning: why things work, not just how to apply them. A place to build solid intuition for one of mathematics’ oldest and most elegant branches.

Today we take a small detour from group theory — here is a remarkable fact about probability.
Alright, alright — that last one was too easy. Time to raise the stakes.

Every number is interesting in its own way, mathematically speaking. If some number were not interesting, it would be considered…
Prime numbers are often called the building blocks of mathematics — all integers are constructed from them, much like all…
You've probably heard about the proof of Fermat's Last Theorem in 1995 — the most famous result in number theory.…


