---
title: "BIP39 Word #700: first — Seed Phrase Mnemonic Word"
url: "https://bip39-phrase.com/bip39-word/first/"
language: "en"
updated: "2026-10-19T00:00:00+00:00"
---

Word #700 01010111011 

# first — BIP39 word #700

"**first**" is word #700 of the 2048 words in the official BIP39 English wordlist, between [firm](/bip39-word/firm/) and [fiscal](/bip39-word/fiscal/). In a seed phrase it stands for the 11-bit value `01010111011`, decimal index 699\. 

/fɜːst/  · _adjective:_ coming before all others in time, order or importance 

[Russian](/ru/ "The BIP39 wordlist with Russian translations"): первый 

## Binary Representation

Seven 1-bits and four 0-bits; 330 of the 2048 indexes have exactly seven 1-bits.

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

[student](/bip39-word/student/)[blast](/bip39-word/blast/)[jazz](/bip39-word/jazz/)[electric](/bip39-word/electric/)[garage](/bip39-word/garage/)[fat](/bip39-word/fat/)[fever](/bip39-word/fever/)[filter](/bip39-word/filter/)[fitness](/bip39-word/fitness/)[fire](/bip39-word/fire/)[firm](/bip39-word/firm/) 

Position

Hex Index

0x2BB

4-Letter Prefix

firs

## About "first" in BIP39

- "first" has 5 letters, but the first four, **"firs"**, already identify it, because **"fir"** also begins [fire](/bip39-word/fire/) and [firm](/bip39-word/firm/).
- "first" appears in one of the 24 official English [test vectors](https://github.com/trezor/python-mnemonic/blob/master/vectors.json) of BIP39: vector #21 (word 4 of 24). Every official vector passes the [checksum checker](/bip39-checksum-checker/), and [How BIP39 works](/how-bip39-works/) shows how the entropy turns into such words.

Official test vector #21

[all](/bip39-word/all/) [hour](/bip39-word/hour/) [make](/bip39-word/make/) first [leader](/bip39-word/leader/) [extend](/bip39-word/extend/) [hole](/bip39-word/hole/) [alien](/bip39-word/alien/) [behind](/bip39-word/behind/) [guard](/bip39-word/guard/) [gospel](/bip39-word/gospel/) [lava](/bip39-word/lava/) [path](/bip39-word/path/) [output](/bip39-word/output/) [census](/bip39-word/census/) [museum](/bip39-word/museum/) [junior](/bip39-word/junior/) [mass](/bip39-word/mass/) [reopen](/bip39-word/reopen/) [famous](/bip39-word/famous/) [sing](/bip39-word/sing/) [advance](/bip39-word/advance/) [salt](/bip39-word/salt/) [reform](/bip39-word/reform/) 

## Word #700 in the Other 9 BIP39 Wordlists

[Czech](/czech/) kukla 

[French](/french/) épaule 

[Italian](/italian/) frigo 

[Japanese](/japanese/) こんぽん 

[Korean](/korean/) 북한 

[Portuguese](/portuguese/) engenho 

[Spanish](/spanish/) fértil 

[Traditional Chinese](/chinese-traditional/) 客 

[Simplified Chinese](/chinese-simplified/) 客 

## Similar Words — Check Carefully During Recovery

Read aloud, "first" /fɜːst/ is one sound away from this word: 

[burst /bɜːst/](/bip39-word/burst/) 

Words sharing the first three letters "fir":

[fire](/bip39-word/fire/)[firm](/bip39-word/firm/) 

## More BIP39 Words Starting with "F"

[ #696 finger ](/bip39-word/finger/)[ #697 finish ](/bip39-word/finish/)[ #698 fire ](/bip39-word/fire/)[ #699 firm ](/bip39-word/firm/)[ #701 fiscal ](/bip39-word/fiscal/)[ #702 fish ](/bip39-word/fish/)[ #703 fit ](/bip39-word/fit/)[ #704 fitness ](/bip39-word/fitness/) 

[View all words starting with "F" ](/bip39-words/f/) 

## Seed phrase, key and recovery guides

- [Bitcoin Improvement Proposal (BIP): Process and Deployed BIP List](/bitcoin-improvement-proposal/)
- [TON Seed Phrase: 24-Word Format vs 12-Word BIP39 Phrases](/seed-phrase-format-for-ton-wallets/)
- [Recover Lost Bitcoin: Find Wallet Backups and Seed Phrases](/recover-lost-bitcoin-find-wallet-backups/)

[ Full BIP39 Wordlist ](/)