Maximum uidNumber (posix / ldap).

Hi all, we are looking at the maximum uidNumber, we need to know the maximum allowed uidNumber for LDAP / POSIX accounts. The schema definition for uidNumber says that it is defined with syntax 1.3.6.1.4.1.1466.115.121.1.27, which is an LDAP number / integer, in http://www.zytrax.com/books/ldap/apa/types.html#numbers the range is defined as 2,147,483,648 to 2,147,483,647, did somebody know if this range is common to LDAP and POSIX? Could we have a user with uidNumber 2,147,483,646 without any problem? Thanks in advance.