Word #51 00000110010
alien — BIP39 word #51
"alien" is word #51 of the 2048 words in the official BIP39 English wordlist, between alert and all.
In a seed phrase it stands for the 11-bit value
00000110010,
decimal index 50.
/ˈeɪliən/ · noun: a creature from another planet, or a person from another country
Russian: пришелец
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
#51 of 2048
Hex Index
0x032
4-Letter Prefix
alie
About "alien" in BIP39
- "alien" has 5 letters, but the first three, "ali", already identify it, because "al" also begins 14 other words, among them alarm, album, alcohol and alert. Three letters are enough for only 604 of the 2048 words.
- "alie" is unique only within the English list: it also begins aliento in the Spanish list and alienar in the Portuguese list, so a four-letter backup should say which list it uses.
- "alien" appears in one of the 24 official English test vectors of BIP39: vector #21 (word 8 of 24). Every official vector passes the checksum checker, and How BIP39 works shows how the entropy turns into such words.
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