<blockquote>
<p><strong>seems to return 128 character key</strong></p>
</blockquote>
<p>That could be the <em>seed number</em> not the key.</p>
<p>As <a href="https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki" rel="nofollow noreferrer">BIP-39</a> says</p>
<blockquote>
<p>This seed can be later used to generate deterministic wallets using BIP-0032 or similar methods.</p>
</blockquote>
<p>I think you need to apply BIP-32 to the seed, using a suitable <a href="https://bitcoin.stackexchange.com/q/78993/13866">derivation path</a>.</p>
<p><a href="https://i.sstatic.net/fzch21C6.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/fzch21C6.png" alt="BIP-32 key derivation diagram" /></a></p>

CC BY-SA 4.0
2024-05-20T14:16:43.243Z
2024-05-20T14:22:01.050Z
2024-05-20T14:22:01.050Z
RedGrittyBrick
<p>Trying to obtain a lost private key from 24 mnemonic phrases and a 25th word. Has anybody successfully managed to do this ? Have looked at BIP39 converter but not sure if this has that ability, and seems to return 128 character key and the wallet requires a 64 hexadecimel input</p>

<private-key><mnemonic-seed>
How to obtain private key from BIP-39 mnemonic
richard
# How to obtain private key from BIP-39 mnemonic

(Asked by: username_0 on 2024-05-18)

Trying to obtain a lost private key from 24 mnemonic phrases and a 25th word. Has anybody successfully managed to do this ? Have looked at BIP39 converter but not sure if this has that ability, and seems to return 128 character key and the wallet requires a 64 hexadecimel input

**Tags:** private-key, mnemonic-seed


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## 1 answers

### Answer by username_1 on 2024-05-20. Score: 0

> **seems to return 128 character key**

That could be the *seed number* not the key.

As [BIP-39](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki) says

> This seed can be later used to generate deterministic wallets using BIP-0032 or similar methods.

I think you need to apply BIP-32 to the seed, using a suitable [derivation path](https://bitcoin.stackexchange.com/q/78993/13866).

[![BIP-32 key derivation diagram](https://i.sstatic.net/fzch21C6.png)](https://i.sstatic.net/fzch21C6.png)


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