"If you’ve seen the low level parts of RSA keys, you’ll immediately recognise this. Otherwise, convert it to an unsigned integer and you get 65537 – a common RS

"If you’ve seen the low level parts of RSA keys, you’ll immediately recognise this. Otherwise, convert it to an unsigned integer and you get 65537 – a common RSA modulus. RSA public keys require two pieces: the modulus and the public exponent. Let’s take a guess that the next piece is going to be the public exponent." That's backwards - 65537 is a common public exponent. The modulus is the 2048-bit long thing. Also, the writer says "2048-byte" RSA key when it's really 2048-bits.