randomnumber / randomseed

[Björnke von Gierke]

I am experimenting with the random functions, and I would like to know 
what exactly the largest number is that the randomseed still accepts, 
as I found out that it generates the same numbers when given too large 
numbers (ca. 10 digits). Also is there such a limit on the randomnumber 
?

Does anyone know how predictable the random function is? That would 
interest me immensely. Also what kind of algorithm does it use? I am 
totally in the unknown on these things...