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Hi to the forum;

A simple question:

I want to make a prime number checker:

So if I want to test if 25 is a prime number.

i should to verify if 2 is a factor.

if it is not, i verify with 3 and 4 (not my subject if not 4 id included in not 2), and finally 5.

with a for loop,

```
for i in range (2, 25):
if 25 % i == 0:
break
else:
print (25, " is a prime number.")
```

is a wrong code because after testing 25 % 2, the conclusion where that 25 is a prime number.

So it is imperative that the condition controlled loop run's from 2 to 24(I know the exageration but It's not my subject).

What is the right procedure?