Because I don't even know what that means. I'm a rookie, as in, I've only been at this about three days. And now I can clarify a little bit
I need to create a form that will allow one to attach a picture, and when said person sends the form, the "whatever" will generate a "random" number. Which apparently should be a number that is in sequence with another number and only appears random (one of my friends explained it to me like that, doesn't mean I understand). Then I need a database to store said info and that will allow people to look it up when needed
I am an idiot, I freely admit that.

I'm an idiot, too.
By the sounds of it, you just need a primary key field with a number in it - primary key means that every row of the table will - and must - have a unique value in this field. You can set the database to fill this field in automatically. If you're using Microsoft Access, then just create a field called ID whose type is
Autonumber. MySQL has an
auto-increment property for fields, I can't remember the syntax, but I can look it up.
Anyway, I wouldn't go messing around with random numbers unless this is really needed for some reason, a unique number field will do fine.
J