31N5731N -101 is written in LEET, most you can go to the link to read about it or even Google it, in short the is Einstein – 101, in a whole its -Einstein one on one- can go on with the description but think you get it.
Leet (1337) is a sociolect variety used primarily on the Internet, particularly in online games. The term itself is derived from the word Elite, meaning “better than the rest,” and generally has the same meaning when referring to the hacking skills of another person.
Leet can be defined as the perturbation or modification of written text. For example, the term leet itself is often written l33t, or 1337, and many other variations. Such perturbations are frequently referred to as “Leetspeak.” In addition to modification of standard language, new colloquialisms have been added to the parlance. It is also important to note that Leet itself is not solely based upon one language or character set. Greek, Russian, Chinese, and other languages have been subjected to the Leet variety. As such, while it may be referred to as a “cipher,” a “dialect,” or a “language,” Leet does not fit squarely into any of these categories. This article primarily concerns the English language variant of Leet.
Calling someone or something leet may be considered a compliment, although it is not uncommon to find it used in an ironic, derogatory manner.