, setting it between 1,000,000 and 9,999,999.
Then it is reversed (ex: 9478666 become 6668749) and a random number is found between the original and the reversed number.
This process is repeated 2 more times (so it is reversed a total of 3 times) to increase the randomness.
Finally, this number is selected to be this dimension's index number.
The process of selecting this dimension's number went as follows:
4355868, 8685534, 7272440, 0442727, 5813291, 1923185, 2559344
Why would this number change?
When this number is selected, a large number of random operations are performed to get the index number.
When jumping dimensions, chances are, one of the random events would give a different outcome, even if it's by one digit.
Furthermore, it is often theorized, that the larger the dimensional jump, the more offset there is in the random numbers being generated at a single point.
Why is this number so long?
This number needs to be of a certain length, in order to be able to detect minute changes in dimensions.
This can be explained with simple maths. The chances of picking a single 3 digit number (100-999) are 1/900 (0.11%) while the chances of picking a 7 digit number (1,000,000-9,999,999) are 1/9,000,000(0.000011%) which is 10,000 times less likely to happen.
While this system is obviously imperfect, I believe any number larger would be difficult to remember when jumping, but for those interested, there is a 12-digit index