cook
/kʊk/
Binary Representation
11-bit index: 00101111101 (decimal 381)
Position
#382 of 2048
Hex Index
0x17D
4-Letter Prefix
cook
About "cook" in BIP39
"cook" is the #382 word
in the official BIP39 English mnemonic wordlist. It is encoded as the 11-bit binary value
00101111101
(decimal index 381), placing it at the 19% mark of the full 2048-word list.
The 4-letter prefix "cook" uniquely identifies this word among all 2048 entries. At just 4 characters, "cook" is one of the shorter words in the BIP39 list, making it quicker to type during wallet recovery but potentially easier to confuse with similar short entries.
Positioned in the first quarter of the wordlist (index 381), "cook" starts with "C" — a letter group containing 186 words total. It is word #129 within that group. Words early in the list have lower binary values with more leading zeros, which can be relevant when analyzing raw entropy data.
In a 12-word seed phrase, each word encodes 11 bits of entropy. The probability of "cook" appearing in any specific position of a randomly generated phrase is 1 in 2048 (≈ 0.049%). A complete 24-word phrase encodes 256 bits of entropy, providing security equivalent to a key space of approximately 1.16 × 10⁷⁷ — far beyond the reach of brute-force attacks.