My_new_roll_no % 3 != 0.. still

It's hardly been 3 days after I posted about my joy when I realized that my new roll no was divisible by 3. But now, it's not. Today it was announced that my new roll no is: 200102005 instead. Now, this isn't divisible by 3. The numbers less than 200102005 which divide it are: 5, 43, 215, 930707, 4653535 and 40020401. But the good thing is that of these factors, 3 are prime and 3 are composite. Having 3 prime factors is not bad! And.... if you add 5 to my roll no, it becomes divisible by 3 again. :-) (5 because my dual degree is a 5 year programme and that *should* have a part to play in the calculations.)