- 5.3: Divisibility
- In this section, we shall study the concept of divisibility.
- 5.6: Fundamental Theorem of Arithmetic
- Primes are positive integers that do not have any proper divisor except 1. Primes can be regarded as the building blocks of all integers with respect to multiplication.
Thumbnail: Golden spiral. Assuming a square has the side length of 1, the next smaller square is 1/φ wide. Then a width of 1/φ², 1/φ³ and so on. Image used with permission (Public Domain; Jahobr).