Harry's Grigott's Vault Number

[Phyllis]

I'm attempting to do the questions each day on the Scholastic HBP 
count-down, and yesterday's question required us to know Harry's 
Grigott's vault number.  Is that in the books anywhere?  We're told 
Sirius' vault number, and the vault number that the Philosopher's 
Stone is in, but I can't recall any references to Harry's vault number.

Thanks!

~Phyllis

P.S. Is anyone on this list going to Lumos?  I'll be there, and am 
doing a presentation on Friday (28 July) at 3:00.  I hope to be able 
to see some of you in person soon!