Each miner is working a on totally different block. Whereas they share a number of the identical knowledge, there are a number of elements of a block that are utterly as much as the miner to resolve, and people variations make the blocks totally different. This additionally signifies that they’ve totally different hashes so each miner is looking out a special a part of the SHA256d search area.
Though every of the blocks each miner is engaged on will share the identical top and mum or dad block, they’ll have totally different transactions, and should have totally different block model numbers, and timestamps.
However the obvious factor goes to be the transactions, that are hashed into the merkle root. Only one transaction being totally different, or only one transaction in a special place, goes to trigger the merkle root to vary, which causes the block header to vary, which thus makes the hash totally different. And each miner goes to have at the very least their coinbase transaction be totally different from everybody else’s. It is because the coinbase transaction accommodates the output that pays the miner, so clearly each miner goes to make their coinbase transaction pay themselves, not another person. From this straightforward truth, the transactions within the blocks that miners are engaged on are going to be totally different in at the very least the coinbase.
So as a result of miners are all engaged on totally different blocks, each nonce that they struggle goes to lead to a block hash that no different miner has seen but. Thus a small miner may very well be fortunate sufficient that the block they’re making an attempt has a nonce that makes the hash meet the PoW requirement earlier than a bigger miner finds such a nonce for his or her block.