What algorithm does Dogecoin use for mining?

Dogecoin initially used a Scrypt algorithm for mining, which is the same algorithm used by Litecoin, another popular cryptocurrency. However, in July 2014, Dogecoin implemented the AuxPoW (Auxiliary Proof of Work) algorithm, also known as merge mining or merged mining.

AuxPoW allows Dogecoin to be mined alongside other cryptocurrencies that use the same mining algorithm, such as Litecoin. This means that miners can simultaneously mine both Dogecoin and Litecoin without having to choose between them. It increases the security of the Dogecoin network by leveraging the hashing power of other cryptocurrencies that use the Scrypt algorithm.

As a result, Dogecoin's mining algorithm is effectively a combination of Scrypt (for its primary chain) and AuxPoW (for merged mining with other compatible cryptocurrencies). This allows Dogecoin to benefit from the security and stability provided by its mining algorithm while also leveraging the hashing power of other networks.