should be 8333 for Bitcoin. Higher values merely ensure that your node will not shut down upon blockchain reorganizations of more than 2 days - which are unlikely to happen in practice. Any blocks released by malicious miners that do not meet the required difficulty target will simply be rejected by everyone on the network and thus will be worthless. Electrum Technologies was founded by Thomas Voegtlin in 2013.
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Bitcoin Core GUI The first time running Bitcoin Core, Max OS X will ask you to confirm that you want to run it: You will be prompted to choose a directory to store the Bitcoin block chain and your wallet. By default, Bitcoin Core allows up to 125 connections to different peers, 8 of which are outbound. If necessary, move the file to the computer you want to use to run Bitcoin Core. Attack target: Bitcoin Core powers the Bitcoin peer-to-peer network, so people who want to disrupt the network may attack Bitcoin Core users in ways that will affect other things you do with your computer, such as an attack that limits your available download bandwidth. When the limit is about to be reached, the uploaded data is cut by no longer serving historic blocks (blocks older than one week).
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