What is the chain ID for core DAO?

Can you please clarify what the chain ID for the CORE DAO is? I understand that the DAO, or Decentralized Autonomous Organization, is a type of blockchain-based entity that operates autonomously through the rules encoded in its smart contract. However, I'm not familiar with a specific "chain ID" associated with the core DAO. Is this referring to a unique identifier for the blockchain network on which the DAO operates, or is it something else entirely? If you could provide some more context or detail, that would be greatly appreciated.