Prime Factorization
Prime Numbers and Composite Numbers
- Prime Numbers: Natural numbers greater than
that have only and themselves as divisors. - Composite Numbers: Natural numbers greater than
that are not prime. In other words, composite numbers have divisors other than and themselves. - The number
is neither a prime number nor a composite number.
Exponents
When multiplying the same number repeatedly, we can simplify the notation using the base number and the number of times it is multiplied. For example:
These are written as
,
,
, and so on, which are read as “2 squared,” “2 cubed,” and “2 to the fourth power,” respectively. Collectively, these are called powers of 2.
- The number being multiplied (
in this case) is called the base. - The number of times it is multiplied (
, , , etc.) is called the exponent.
Prime Factorization
The prime factors of a natural number are the prime numbers that divide it. Generally, when a natural number is expressed as a product of its prime factors, the result is unique if the order of multiplication is disregarded.
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