We need to find the largest prime less than or equal to the square root of 950.
The square root of 950 is between 30 and 31.
Checking primes less than or equal to 29, we find that 29 is the largest prime divisor we need to test.
Therefore, the largest prime divisor we need to test is $\boxed{29}$.
The answer is: 29
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
To test whether an integer, $n$, is prime, it is enough to be sure that none of the primes less than or equal to the square root of $n$ divide $n$. If you want to check that a number between 900 and 950 is prime with this rule, what is the largest prime divisor you need to test?

### Answer:
