The ventral portion of the medulla oblongata contains the medullary pyramids. These two ridge-like structures travel along the length of the medulla oblongata and are bordered medially by the anterior median fissure. They each have an anterolateral sulcus along their lateral borders, where the hypoglossal nerve emerges from.
Assuming that you mean the FICO score, the highest is 850. In order to have that score, one must obviously have a perfect payment record over a long term and low (or zero) credit card balances, but the other essential ingredient is the length of time accounts have been established. A revolving (credit card) account ten years old or older is a definite enhancement.
It is not as much of a secret as a matter of unawareness. Most people while all have a credit score, good, bad or ugly, may not necessarily be in the know of this much sought after fact. Well, to unlock the mystery, the FICO score of 850 is the highest credit score any borrower can achieve. And oh what a score it is! 850 is the perfect credit score whose acquirer finds himself being in the middle of credit offers and being approved by lenders for all sorts of financing that he may apply for.