Oracle DBMS_RANDOM algorithm? Oracle DBMS offer builtin random number generator (pseudo to be accurate). DBMS_RANDOM is one of the available packages, it is however considered as insecure for cryptography.
Do we happen to know the algorithm used by this method ?
A quick Google search shows the source code is available in the file dbmsrand.sql, which says:

-- Delayed Fibonacci, pilfered from Knuth volume 2