Prime factorization of $$$2779$$$

Find the prime factorization of $$$2779$$$.

Start with the number $$$2$$$.

Determine whether $$$2779$$$ is divisible by $$$2$$$.

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

The next prime number is $$$3$$$.

Determine whether $$$2779$$$ is divisible by $$$3$$$.

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

The next prime number is $$$5$$$.

Determine whether $$$2779$$$ is divisible by $$$5$$$.

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

The next prime number is $$$7$$$.

Determine whether $$$2779$$$ is divisible by $$$7$$$.

It is divisible, thus, divide $$$2779$$$ by $$${\color{green}7}$$$: $$$\frac{2779}{7} = {\color{red}397}$$$.

The prime number $$${\color{green}397}$$$ has no other factors then $$$1$$$ and $$${\color{green}397}$$$: $$$\frac{397}{397} = {\color{red}1}$$$.

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: $$$2779 = 7 \cdot 397$$$.

The prime factorization is $$$2779 = 7 \cdot 397$$$A.