The product is a 500 Cordobas banknote from Nicaragua, issued in 2017 by the Central Bank. It has been certified by PMG with a grade of 64 and a grade designation of EPQ. The banknote is uncirculated and features a binary serial number 00101001. The binary number 00101001 represents the decimal number 41.

A binary number is a number expressed in the base-2 numeral system. In binary, each digit can be either 0 or 1, unlike our familiar decimal system (base-10), which uses digits from 0 to 9. In binary, each position in a number represents a power of 2. 1 in binary is 1 in decimal (2^0 = 1). 10 in binary is 2 in decimal (2^1 = 2).

11 in binary is 3 in decimal (2^1 + 2^0 = 3). 100 in binary is 4 in decimal (2^2 = 4). 101 in binary is 5 in decimal (2^2 + 2^0 = 5).Binary is fundamental in computing because computers represent data and perform calculations using sequences of 0s and 1s.