I need to generate a 12 digit random number per application from all possible 12 digit numbers, such that a number generated should noty again be generated until the application is run for 4294967296 times.

So I need to store the generated numbers in the data base, so that the application when run can check with this stored numbers. and also need to modify the stored numbers after the application is run for 4294967296 times.

please suggest me some procedure to do this ....