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Laszlo Hanyecz

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In plain words

Laszlo Hanyecz: Early developer; first public GPU miner; bought two pizzas for 10,000 BTC. Released an OpenCL GPU miner in May 2010 and maintained early Mac OS builds. On 22 May 2010 he paid 10,000 BTC for two pizzas, now celebrated as Bitcoin Pizza Day.

Source: bitcointalk.org

Key facts

FactValueSource
Also known aslaszlo (BitcoinTalk)bitcointalk.org
RoleEarly developer; first public GPU miner; bought two pizzas for 10,000 BTCbitcointalk.org
First known Bitcoin linkGPU mining post, 10 May 2010bitcointalk.org

Background

GPU programming (OpenCL) and Mac OS builds of Bitcoin (his words) [bitcointalk.org]

What is not known

No X account shown: two accounts (@LaszloHanyecz, @laszlo_hanyecz) use his name, but neither is linked from anything he's confirmed and their bios contradict each other.

Timeline

- 22 May 2010: Pays 10,000 BTC for two pizzas (block 57,043). [mempool.space]

In their own words

“I have a working prototype of Bitcoin generation with OpenCL.” (10 May 2010, via BitcoinTalk) [bitcointalk.org]

“I'll pay 10,000 bitcoins for a couple of pizzas.. like maybe 2 large ones so I have some left over for the next day.” (18 May 2010, via BitcoinTalk) [bitcointalk.org]

FAQ

Who is Laszlo Hanyecz?
Laszlo Hanyecz: Early developer; first public GPU miner; bought two pizzas for 10,000 BTC. Released an OpenCL GPU miner in May 2010 and maintained early Mac OS builds. On 22 May 2010 he paid 10,000 BTC for two pizzas, now celebrated as Bitcoin Pizza Day. (source: bitcointalk.org)
When did Laszlo Hanyecz first appear in Bitcoin's history?
GPU mining post, 10 May 2010. (source: bitcointalk.org)
Watch: The story behind Bitcoin Pizza Day (60 Minutes) (2019)

References

  1. bitcointalk.org bitcointalk.org
  2. BitcoinTalk · laszlo bitcointalk.org
  3. bitcointalk.org bitcointalk.org
  4. mempool.space mempool.space