New posts in Modular Arithmetic

How can we prove that $\gcd((n^4) + (n+1)^4 , (n+1)^4 + (n+2)^4) = 1$?

Potentially new approach to factoring big numbers

Isn't 1 congruent to -1?

Computing $\gcd\{n^k - n^\ell : n \in \mathbb Z\}$

$4x≡2\mod5$ can you divide both sides by $2$ to get $2x≡1\mod5\,?$

Conjecture: smallest missing mod value always yields previous prime

Can $7$ be the smallest prime factor of a repunit?

Polynomial that indicates whether or not $x = 1 \pmod n$.

Solutions $a,b,c \mid 1+a+b+c $ over positive integers algebraically (avoiding brute force)?

Is $x^6 + 108$ irreducible over $\mathbb{Q}$?