Hal Finney was a pre-bitcoin #cryptographic pioneer and the first person (other than Nakamoto himself) to use the #bitcoin software, file bug reports, and make improvements. He also lived a few blocks from Dorian Nakamoto's family home. In 2004, Finney created the first reusable proof of work (#RPOW) system before bitcoin. In January 2009, Finney was the Bitcoin network's first transaction recipient (10BTC from Satoshi in Block#170)
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