>>4842364 (pb)
Ah, yeah you can. Double numbers like 11 and 22 are traditionally considered significant and you can stop on them.
I can't see any reason why you can't stop on 17 (a prime) if that's what you're testing for.
After all, you may as well be testing for 8, and 17 is not the same as 35, 44 etc.
2c