Word #1746 11011010001
surface — BIP39 word #1746
"surface" is word #1746 of the 2048 words in the official BIP39 English wordlist, between sure and surge.
In a seed phrase it stands for the 11-bit value
11011010001,
decimal index 1745.
/ˈsɜːfɪs/ · noun: the outside or top layer of something
Russian: поверхность
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):
Position
#1746 of 2048
Hex Index
0x6D1
4-Letter Prefix
surf
About "surface" in BIP39
- "surface" has 7 letters, but the first four, "surf", already identify it, because "sur" also begins sure, surge, surprise, surround and survey.
- The same spelling is in the French BIP39 wordlist, but as word #1831 (index 1830), not #1746. A wallet set to French reads "surface" as 11100100110 instead of 11011010001, and decodes index 1745 as "séminal".
- "surf" is unique only within the English list: it also begins surfista in the Portuguese list, so a four-letter backup should say which list it uses.