use of production mnemonic, entropy or seed is not recommended.
132 (12x11) bit equivalent of bip39 mnemonic
entropy
128 bit entropy + 4 bit crc
calculated crc : highest 4 bits of sha256 (of entropy)
seed
seed : keyspace expansion with 2048 pbkdf2 rounds of hmac-sha512 (of entropy)
extended private key (xprv) : sha512-hmac (of seed) rearranged and padded with additional bip32 parameters and crc
derivation path
m/49'/0'/0'/0/0
private key
public key
address
balance