The simple answer is NO
But there is a way of making it appear to the user that it is doing so.
Use TWO fields
FieldA is the real auto-number, start with 1001 and it will increment from there
FieldB holds the suffix that you need to generate programatically
The concatenate them together on forms and reports.
HOWEVER, the purists ( pedants ) amongst us ( & I'm usually one of that number - so I'm not being derogatory ) would say that if users are going to see the primary key, and it's sequence / contents actually contains information ( which an auto-number does not ) then you should generate it yourself anyway. In that case you can develop whatever format you like, But the two field primary key format, as mentioned above, sounds like your easiest solution.
'ope-that-'elps.
Let the system generate your
G LS
spsinkNOJUNK@yahoo.co.uk
Remove the NOJUNK to use.