\bmodThe \bmod operator is used to denote the modulo operation, which finds the remainder after division of one number by another.
The remainder when a is divided by b is r.
a \bmod b = r10 divided by 3 leaves a remainder of 1.
10 \bmod 3 = 1x is congruent to y modulo n, meaning (x - y) is divisible by n.
x \equiv y \pmod{n}