How to generate account number?

[Andriy Kornatskyy]

Requirements for `account number` generator:

1. Issue pseudo random consistent number (must be unique for dozen millions of records)
2. Easy check validity (without a need to make a database call)

Interested? Read more here:

http://mindref.blogspot.com/2012/11/generate-account-number.html

Comments or suggestions are welcome.

Thanks.

Andriy Kornatskyy