Maximum no of profiles that can be assigned to one user

WE CAN ASSIGN 312 PROFILE TO USER. The table USR04 contains the

User master authorizations.In this table the field XUPROFS contains 

the profiles whose size is 3750 characters.
it also hold the change status of the user with 4 characters. 

Each profile conains 12 characters
so number of profiles = 3750-4/1 nearly 312