abc conjecture
aliquot part

Beal's conjecture
Brocard problem

Catalan's conjecture
Chinese remainder theorem
Collatz problem
congruum problem
cube number

decimal system
digit
digital root
Diophantine equation

elliptic curve
Euler's conjecture

Fermat number
Fermat's last theorem
fraction

Gelfond's theorem

multigrade

number
number patterns
number theory

parity
Pell equation

rational number
Riemann hypothesis
Riemann zeta function

square number

Waring's conjecture