Genesis Block is the first block in the Bitcoin (blockchain) chain. In the modern version, the Genesis Block is considered block number 0, whereas in the previous version, the Genesis Block was named the 1st block. This block is different from other blocks because it does not refer to the previous block as it was the first block created. 50 Bitcoin created from this block goes into the wallet with the address: 1A1zP1eP5Qgefi2DMPTfTL5SLmv7DivfNa. As of July 2016, over 420,000 blocks have been created.