# Genesis Block 1. The first or first few [[Block(s)|blocks]] of a [[Blockchain|blockchain]]. Modern versions of Bitcoin number it as block 0, though very early versions counted it as block 1. The genesis [[Block(s)|block]] is almost always hardcoded into the software of the applications that utilize its blockchain. 2. The [[Bitcoin (blockchain)]] genesis [[Block(s)]] was the first block [[Mining|mined]] on the Bitcoin [[blockchain]]. It was mined on January 3, 2009. 3. The original [[Block(s)|block]] in a [[blockchain]]. The genesis block has a [[Block Height|block height]] of zero, and all other blocks are intrinsically linked to it. Genesis blocks can be configurable to create a fork of a chain for purposes such as pre-loading accounts with tokens for a test network or specifying different block parameters. 4. The very first [[Block(s)|block]] in the blockchain. 5. The first block in a [[blockchain]] structure is known as the genesis [[Block(s)|block]]. The [[Block Height|block height ]] for the genesis block is zero. Most important of all, all the other blocks in the blockchain are linked intrinsically to the genesis block. It is possible to configure genesis blocks for creating a [[Fork|fork]] of a chain of purposes, including specification of different block parameters or pre-loading accounts with tokens for test networks. 7. A [[Blockchain|blockchain]] is a string of "[[Block(s)|block]]" that are linked together in order. Each block is a collection of bundled [[Transaction(s)|transactions]]. The genesis block is the very first block of a blockchain. 5. The first block in the Bitcoin [[Blockchain|blockchain]]. Synonyms: Genesis block || [[Block 0]] Not To Be Confused With: Generation transaction (the first transaction in a block) 7. The first block of data that is processed and validated to form a new [[Blockchain|blockchain]], often referred to as [[block 0]] or block 1.