Bitcoin uses peer-to-peer technology to operate with no central authority or banks; managing transactions and the issuing of bitcoins is carried out collectively by the network. Bitcoin is open-source; its design is public, nobody owns or controls Bitcoin and everyone can take part. Through many of its unique properties, Bitcoin allows exciting uses that could not be covered by any previous payment system. Source: bitcoin.org
Mining solo with 100 Th/s The BTC network have an estimate of 111 blocks per day, and a network hashrate of 154.98 EH/s. With a hashrate of 100 Th/s, which equals to 0.0000645% of the network, you will have 0.00716% chance of finding a block in a day. On average, you will find 1 block every 13962 days at the current network hashrate.