Calculate next Primary Key - of specific format

Question

I have a table which holds a list of IDs, and various other columns such as IDName.

The Primary Key of the table is the ID itself, however it does not auto_increment

Answer 1

Ok, so far I've come up with, I think this will meet my requirements (unless there are any suggestions about a more optimal way to do it?)

SELECT ID 
FROM myTable 
WHERE ID > 27770000 
  AND ID < 27780000 
ORDER BY ID DESC 
LIMIT 1