Oops, try again. Your function fails on is_prime(9). It returns True when it should return False.

I expected it to return False, but it returned True

```
def is_prime(x):
if x == 2:
return True
elif x>2:
for n in range(2, x):
if x%n == 0:
return False
else:
return True
else:
return False
```