What is merge mining and does Monero support it?

Merge mining means using the same mining work to help secure two or more cryptocurrencies at once. Monero does not accept another blockchain’s mining work as a substitute for its own, but it can serve as the parent chain for a compatible merge-mined coin. So “Monero does not support merge mining” is too broad: it depends on which role you mean.

How one piece of work can serve two coins

Mining involves making repeated calculations to find a result that meets a network’s rules. That result is called proof of work: evidence that a miner spent computing effort.

With merge mining, a miner includes a small reference to another coin’s proposed block inside the work prepared for the main coin. A block is a batch of transactions added to a blockchain—the network’s shared transaction record.

The two networks play different roles:

• Parent chain: The network whose mining work is being performed directly.
• Auxiliary chain: The network that has rules for accepting evidence of that parent-chain work.

The auxiliary network checks both the mining result and the reference tying it to its own block. Each network still has its own difficulty threshold, meaning how hard a valid result must be to find. A result may qualify for one network without qualifying for both.

Where Monero fits

Monero uses RandomX, a mining algorithm designed to favor general-purpose processors, or CPUs. It has used RandomX since November 30, 2019.

Monero’s rules do not let you submit Bitcoin mining work, for example, and claim a valid Monero block. Monero blocks must satisfy Monero’s own RandomX requirements.

However, another network can design its rules to accept proofs based on Monero mining. In that arrangement, Monero is the parent chain. Its miners can include the necessary auxiliary-chain reference without Monero needing to adopt the other network’s consensus rules—the rules deciding which blocks are valid.

Tari is a real-world example: its RandomX mining component supports merge mining with Monero. This does not mean every Monero miner or pool automatically mines Tari.

What you need to participate

You need more than an ordinary Monero wallet. Participation depends on mining software and infrastructure that support the particular pairing.

Before using a service, check:

• Whether it actually supports Monero merge mining.
• Which additional coin it mines.
• Whether you receive that coin, an XMR payment instead, or no additional payout.
• Its fees, payout minimums, and wallet requirements.

A mining pool combines work from many miners and distributes rewards under its own payout rules. A pool can perform merge mining without passing the extra rewards directly to you, so read those rules carefully.

What this means for browser mining

Running a Monero browser miner does not automatically give you merge-mining rewards. The service behind it must support the arrangement and explicitly credit you.

Reusing mining calculations can reduce the extra computing work needed, but it does not guarantee extra profit. There can still be software, storage, network, and payment costs. Be wary of claims that merge mining “doubles your earnings” or makes browser mining reliably profitable.

The bottom line

You can participate in merge mining with Monero as the parent chain through compatible software or services. Monero itself still requires its own RandomX proof of work, and any additional rewards depend on the auxiliary network and the service’s payout policy.