first, do we talk about fields or values. is it correct to say that it is a 32 or 256 bit value ? or should we call it a 32 or 256 bit field ?
Why do some authors like say that the size is 32 bit . The bitcoin wiki states that it is 256 bit. See https://en.bitcoin.it/wiki/Difficulty it says (target is a 256 bit number) .
who is correct and where in the core can i take a look at it ?