Just trying to figure out how many different possibilities there are in a QR code that's 25x25.. I think I have the answer.. but I want to validate it.. Each unit in a QR code is either black or white, so two possible values... There are 625 units (25x25).. So since each unit is a binary value, you could think of it as a a 625 digit binary number... the largest value of which would be 2^625 (-1)... So 2^625 would be the number of possibilities?

Question

Just trying to figure out how many different possibilities there are in a QR code that's 25x25.. I think I have the answer.. but I want to validate it..  Each unit in a QR code is either black or white, so two possible values...  There are 625 units (25x25)..  So since each unit is a binary value, you could think of it as a a 625 digit binary number... the largest value of which would be 2^625 (-1)... So 2^625 would be the number of possibilities?

anonymous · Answer

sounds right to me