# Prime factorization of $1533$

The calculator will find the prime factorization of $1533$, with steps shown.

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Find the prime factorization of $1533$.

### Solution

Start with the number $2$.

Determine whether $1533$ is divisible by $2$.

Since it is not divisible, move to the next prime number.

The next prime number is $3$.

Determine whether $1533$ is divisible by $3$.

It is divisible, thus, divide $1533$ by ${\color{green}3}$: $\frac{1533}{3} = {\color{red}511}$.

Determine whether $511$ is divisible by $3$.

Since it is not divisible, move to the next prime number.

The next prime number is $5$.

Determine whether $511$ is divisible by $5$.

Since it is not divisible, move to the next prime number.

The next prime number is $7$.

Determine whether $511$ is divisible by $7$.

It is divisible, thus, divide $511$ by ${\color{green}7}$: $\frac{511}{7} = {\color{red}73}$.

The prime number ${\color{green}73}$ has no other factors then $1$ and ${\color{green}73}$: $\frac{73}{73} = {\color{red}1}$.

Since we have obtained $1$, we are done.

Now, just count the number of occurences of the divisors (green numbers), and write down the prime factorization: $1533 = 3 \cdot 7 \cdot 73$.

The prime factorization is $1533 = 3 \cdot 7 \cdot 73$A.