this
/ðɪs/
Binary Representation
11-bit index: 11100000110 (decimal 1798)
Position
#1799 of 2048
Hex Index
0x706
4-Letter Prefix
this
About "this" in BIP39
"this" is the #1799 word
in the official BIP39 English mnemonic wordlist. It is encoded as the 11-bit binary value
11100000110
(decimal index 1798), placing it at the 88% mark of the full 2048-word list.
The 4-letter prefix "this" uniquely identifies this word among all 2048 entries. At just 4 characters, "this" 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.
Near the end of the wordlist (index 1798), "this" is part of the "T" letter group with 121 entries total, positioned at #32 in that group. Words in the upper range of the list have binary representations with more leading 1s.
In a 12-word seed phrase, each word encodes 11 bits of entropy. The probability of "this" 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.
Word #1799 in the Other 9 BIP39 Wordlists
Every official BIP39 wordlist has exactly 2048 entries, so index 1798 encodes the same 11-bit value
(11100000110) in every language.
A wallet configured for one of these languages would use this word instead of "this":
Similar Words — Check Carefully During Recovery
Words sharing the first three letters "thi":
Reminder: the first 4 letters of every BIP39 word are unique across the whole list, so "this" always identifies "this".