4 Modulo 2. Therefore 2 mod 4 is 2. Such an equation may be useful when dealing with big numbers, and we don't know the modulo of that large number instantly.

Noh yeremeas bin abdullah on year 3 module 5 :

In writing, it is frequently abbreviated as mod, or represented by the symbol %. A primitive root modulo n exists if and only if n is equal to 2, 4, p k or 2p k, where p is an odd prime number and k is a positive integer. Modulus congruence means that both numbers, 11 and 16 for example, have the same remainder after the same modular (mod 5 for example). An ally is a person who belongs to a privileged group and takes action to challenge the status quo and promote inclusiveness and social justice.