Ideally you want 6 or 7 leading 0's. But even 5 could be OK, if the others are very low (150 etc) or something like 444 etc.
I have 2 5's with 4 leading 0's and I can't bear to part with them. I like the larger serial better, because there are 6 0's.
Not bad but a few more zeros would be nice. It's only a ten so you might want to keep it until a lower one comes along.
