Since 53 is prime, $\boxed{\sqrt{53}}$ is already in simplest radical form.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is $\sqrt{53}$ in simplest radical form?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\sqrt{53}
What is $\sqrt{53}$ in simplest radical form?
test