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{{ printedBook.courseTrack.name }} {{ printedBook.name }} Whole numbers which are not a prime number are called a *composite number*. These numbers can be divided into a product of two, or more, lower whole numbers.
$12 = 3 \cdot 4.$
The procedure can then be repeated until $12=3 \cdot 2\cdot 2.$
All composite numbers can be factored into primes in only **one way**. This relationship ties together all whole numbers in a fundamental manner which is why it is called the *Fundamental Theorem of Arithmetic.*