Number theory facts for kids
Number theory is a part of mathematics. It explains what some types of numbers are, what properties they have, and ways that they can be useful.
Topics in number theory are:
Important theorems in number theory are:
 Chinese remainder theorem
 Fundamental theorem of arithmetic
 Fermat's last theorem
 Fermat's little theorem
Applications
A wellknown application of number theory is encrypted messaging (encryption). Data compression also makes use of the field.
 Vinogradov, I.M. (2003) [1954]. Elements of Number Theory (reprint o 1954 ed.). Mineola, NY: Dover Publications.
Images for kids

The distribution of prime numbers is a central point of study in number theory. This Ulam spiral serves to illustrate it, hinting, in particular, at the conditional independence between being prime and being a value of certain quadratic polynomials.

Title page of the 1621 edition of Diophantus's Arithmetica, translated into Latin by Claude Gaspard Bachet de Méziriac.

AlHaytham as seen by the West: on the frontispiece of Selenographia Alhasen [sic] represents knowledge through reason and Galileo knowledge through the senses.

"Here was a problem, that I, a 10 year old, could understand, and I knew from that moment that I would never let it go. I had to solve it." – Sir Andrew Wiles about his proof of Fermat's Last Theorem.

Carl Friedrich Gauss's Disquisitiones Arithmeticae, first edition

Number theorists Paul Erdős and Terence Tao in 1985, when Erdős was 72 and Tao was 10.

Riemann zeta function ζ(s) in the complex plane. The color of a point s gives the value of ζ(s): dark colors denote values close to zero and hue gives the value's argument.
See also
In Spanish: Teoría de números para niños
Marie Arana 
Sandra Cisneros 
Sergio Troncoso 
Nina Serrano 