a simple wallet address (p2pkh) is simply obtained by the function hash160(public_key)
So if you have the possibility to browse the entire 1-2^256 space and to compute the hash160 function for every hash160(public_key) derived from 1-2^256 private keys you will find an average of 2^(256-160) = 2^96 public key with hash160=16jY7qLJnxb7CHZyqBP8qca9d51gAjyXQN .
So if you have the possibility to browse the entire 1-2^256 space and to compute the hash160 function for every hash160(public_key) derived from 1-2^256 private keys you will find an average of 2^(256-160) = 2^96 public key with hash160=16jY7qLJnxb7CHZyqBP8qca9d51gAjyXQN .
For the public address (p2pkh) you perform the following two nested hash functions RIPEMD160(SHA256(public_key)) as far as I remember.
It doesn't spoil your further calculation too much, but the valid range for private keys is any 256-bit number from 0x1 to 0xFFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFE BAAE DCE6 AF48 A03B BFD2 5E8C D036 4140. Anyway, you're in the correct ballpark.
