In a recent blog post, I wrote about random numbers and Powershell. As noted in that article, you can create a new random number object as follows:
$rand = New-Object System.Random
This approach to creating the random number object seeds the random number generator with a pseudo-random number (current time). Therefore, if you try this at home, you're not likely to see the same result to $rand.next(), i.e. 129641862.
If you wanted to create a repeatable random number sequence (which is of course not actually random!), you could add a seed number as follows:
$rand = New-Object System.Random 1234567
If you try this code at home, you should get the same result to the call to $r4and.next (i.e. 1673116976).