Unix Security - SU logs

Hi,
Hope its good with everyone.

I have the below su logs and i dont understand the bolded numbers. can someone help me please.

Jul 24 11:55:50 su: - 8 username
Jul 24 12:12:40 su: - 10 username
Jul 26 11:15:32 su: - 7 username

I understand these are failed logins but what does that number (8,10,7) indicate??

Thanks for helping.
-Indra

There will be a manpage for the sulog file which will inform you of what each column is, I have not located an HP-UX manpage for it online, here is the Solaris one (no guarentee the formatting will be the same):
sulog man page