Prime factorization of $$$1243$$$
Your Input
Find the prime factorization of $$$1243$$$.
Solution
Start with the number $$$2$$$.
Determine whether $$$1243$$$ is divisible by $$$2$$$.
Since it is not divisible, move to the next prime number.
The next prime number is $$$3$$$.
Determine whether $$$1243$$$ is divisible by $$$3$$$.
Since it is not divisible, move to the next prime number.
The next prime number is $$$5$$$.
Determine whether $$$1243$$$ is divisible by $$$5$$$.
Since it is not divisible, move to the next prime number.
The next prime number is $$$7$$$.
Determine whether $$$1243$$$ is divisible by $$$7$$$.
Since it is not divisible, move to the next prime number.
The next prime number is $$$11$$$.
Determine whether $$$1243$$$ is divisible by $$$11$$$.
It is divisible, thus, divide $$$1243$$$ by $$${\color{green}11}$$$: $$$\frac{1243}{11} = {\color{red}113}$$$.
The prime number $$${\color{green}113}$$$ has no other factors then $$$1$$$ and $$${\color{green}113}$$$: $$$\frac{113}{113} = {\color{red}1}$$$.
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: $$$1243 = 11 \cdot 113$$$.
Answer
The prime factorization is $$$1243 = 11 \cdot 113$$$A.