Magnetic reader

is this acurate?

How can anyone tell? What is the number supposed to be on the card?

how can i convert it to binary code?

It is already in binary, that is how it is stored in the computer. When you print it out it is converted to decimal.
Exactly what do you want to do with the number? If it is just to print it the look at the serial.print in the reference and see what you need to add to get it to output in binary.