Word #1920 11101111111
useful — BIP39 word #1920
"useful" is word #1920 of the 2048 words in the official BIP39 English wordlist, between used and useless.
In a seed phrase it stands for the 11-bit value
11101111111,
decimal index 1919.
/ˈjuːsfʊl/ · adjective: able to help you do or achieve something
Russian: полезный
Binary Representation
A single 0-bit, which only ten other indexes share: lend, say, that, wave, winner, worth, year, youth, zero and zone.
One wrong bit turns it into (leftmost bit first):
Position
#1920 of 2048
Hex Index
0x77F
4-Letter Prefix
usef
About "useful" in BIP39
- "useful" has 6 letters, but the first four, "usef", already identify it, because "use" also begins use, used and useless.
- Its first letters also spell another BIP39 word, use. Write "useful" out in full: cut short, it turns into a different valid word.
- "useful" appears in three of the 24 official English test vectors of BIP39: vectors #2 (word 8 of 12), #6 (words 8 and 16 of 18) and #10 (words 8 and 16 of 24). Every official vector passes the checksum checker, and How BIP39 works shows how the entropy turns into such words.
legal winner thank year wave sausage worth useful legal winner thank yellow