Word #1243 10011011010

opera — BIP39 word #1243

"opera" is word #1243 of the 2048 words in the official BIP39 English wordlist, between open and opinion. In a seed phrase it stands for the 11-bit value 10011011010, decimal index 1242.

/ˈɒpərə/ · noun: a dramatic work in which the words are sung to music

Russian: опера

Binary Representation

Six 1-bits and five 0-bits; 462 of the 2048 indexes have exactly six 1-bits.

One wrong bit turns it into (leftmost bit first):

brave swap robust mercy nation palm off olympic orange only opinion

Position

#1243 of 2048

Hex Index

0x4DA

4-Letter Prefix

oper

About "opera" in BIP39

"opera" has 5 letters, but the first four, "oper", already identify it, because "ope" also begins open.
"oper" is unique only within the English list: it also begins operato in the Italian list, operador in the Portuguese list and operace in the Czech list, so a four-letter backup should say which list it uses.