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I think I get it. It’s not a real burn address, not like an unspendable UTXO. It’s burn address just because it’s crazy hard to get a private key that derives that address.

Exactly there is no "burn address" built into bitcoin code, but there are addresses that are so improbable that there is no real way someone holds the private key.

There are tools that generate "vanity addresses" (along with private key) but typically it becomes impossible after the first few chars. So you can probably easily generate private key for bc111XXXXX address but generating bc111111111111111... is impossible.

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26 sats \ 1 reply \ @Fenix 26 May

Isn't the probability of generating all types of wallet addresses the same? What makes this pattern different or even “impossible” if the function is the same for everyone?

Ps: Don’t worry, the link here helped.

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It’s not impossible, it’s just that the number space is so enormous that it’s exceedingly unlikely that it will ever be found: every random private key you generate will map to one of 2160 possible P2PKH addresses.

Also see, Bitcoin Stack Exchange Is each Bitcoin address unique?

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