j"19HxigV4QyBv3tHpQVcUEQyq1pzZVdoAutMÜ<div class="post"><div class="quoteheader">Quote</div><div class="quote">I wonder if it writes to the debug log when it has success.</div><br/>BitCoin does say when it has solved a block. Search for "proof-of-work found".<br/><br/><div class="quoteheader">Quote</div><div class="quote">In Bitcoin, aren't multiple nodes working on the same block?</div><br/>No. Each node's block is unique because it contains their unique public key. Functionally, every hash gives you a totally random number between 0 and the maximum value of a 256-bit number. If the random number is equal to or below the target, you win. So the probability of winning with one hash is <i>target</i> in <i>max</i>.<br/><br/>Starting on another block because somebody else won requires almost no work.<br/><br/>See the BitCoin Wiki <a href="http://www.bitcoin.org/wiki/doku.php?id=block">"block" article</a> and the <a href="http://www.bitcoin.org/sites/default/files/bitcoin.pdf">BitCoin paper</a> for more info.</div> text/html
https://whatsonchain.com/tx/c2c9224cdf71c8bf1b3e7d1ae8ebcf2c96a3dc62fc315ece70a24f0587aacdfd