Word #649 01010001000
extra — BIP39 word #649
"extra" is word #649 of the 2048 words in the official BIP39 English wordlist, between extend and eye.
In a seed phrase it stands for the 11-bit value
01010001000,
decimal index 648.
/ˈɛkstrə/ · adjective: more than is usual, expected or necessary
Russian: дополнительный
Binary Representation
Three 1-bits and eight 0-bits; 165 of the 2048 indexes have exactly three 1-bits.
One wrong bit turns it into (leftmost bit first):
Position
#649 of 2048
Hex Index
0x288
4-Letter Prefix
extr
About "extra" in BIP39
- "extra" has 5 letters, but the first four, "extr", already identify it, because "ext" also begins extend.
- "extr" is unique only within the English list: it also begins extraire in the French list, extremo in the Spanish list, extrato in the Portuguese list and extrakt in the Czech list, so a four-letter backup should say which list it uses.
Word #649 in the Other 9 BIP39 Wordlists
Similar Words — Check Carefully During Recovery
Words sharing the first three letters "ext":