> I'm no expert, but mining is just your computer taking the last valid block and trying to make a new one based on it by guessing a solution over and over. >

> I'm no expert, but mining is just your computer taking the last valid block and trying to make a new one based on it by guessing a solution over and over. > Every 10 minutes or so, some miner on the network guesses correctly, and their block becomes the new one that everyone uses for their guessing. > If your miner isn't on the network, it'll never be told that some other miner guessed correctly and that everyone else on the network is now working on a newer block. Your miner will keep on guessing, but if it does eventually guess correctly, it won't matter as the network has moved on. https://www.reddit.com/r/Bitcoin/comments/sjfds/why_am_i_able_to_mine_bitcoin_offline_this_seems/c4ei4ve/ https://www.reddit.com/r/Bitcoin/comments/sjfds/why_am_i_abl... Seems kind of inefficient?