>>Thanks. Is it the fastest algorithm here? I was just going to take a look and was thinking along the same lines.
>
>Cannot guaranty that. :)
>
><snip>

Well, guess what? <g>

Error: 1103, Message: Invalid seek offset. Time spent: 5337 sec.

It looks like it was working much slower (I was doing a test for 4K file).

I'm going to undo Jason and Jaime suggestions now, because I believe it slowed down the process (your new version of the ValidateSSN function and new age test should not have done it) <g>

Jaime, shame on you <g>