Chapter 4: Knot Products In the natural numbers there are prime numbers and compound numbers. Prime numbers can be divided evenly only by themselves and 1. 2,3,5,7,11,13 are prime numbers.  Compound numbers can be written as products of primes.  For example, 18 = 2 x 3 x 3.  Knots are like this. There are prime … Continue reading Chapter 4: Knot Products