High-shine is any leg wear that is very shiny, including wet look items. This is for making your legs very noticeable and to attract attention to your outfit high gloss and other similar terminology. These are items that end at the ankle, leaving the foot free.
Roman numeric system. The numbers 1 to 10 are usually expressed in Roman numerals as follows: Numbers are formed by combining symbols and adding the values, so II is two (two ones) and XIII is thirteen (a ten and three ones).
This number is a Mersenne Prime, an extremely rare prime number that is one less than a power of two. This means that two is multiplied by itself over and over again, and then subtracted by one. In this particular case, the number is two multiplied by itself 74,207,281 times -- minus one.