Bitcoin Merge Mining Pool

Stratum Host	mmpool.org	Stratum Port	3333 or 3334
Hashrate (Th/s)	25.2	Round Duration	17763:30:05	Round Shares	3,089,515,033,287	Round CDF	33.91%

2018-07-18: NiceHash or high difficulty miners can use port 3334 instead of 3333. Starting difficulty on that port is 1,000,000.

FAQ

How do I configure common miners?

bfgminer: Stratum: ./bfgminer -o stratum+tcp://mmpool.org:3333 -u myuserid -p anything
cgminer: Stratum with starting difficulty 16: ./cgminer -o stratum+tcp://mmpool.org:3333 -u myuserid -p anything --suggested-diff 16
cgminer using TOR: Stratum: usewithtor ./cgminer -o stratum+tcp://phkttm64gbquasaq.onion:3333 -u myusername -p anything

Can I use rental services to mine here?

Yes, rental services have been used successfully to mine at mmpool.

How can I adjust the difficulty I mine at?

Difficulty is automatically adjusted by the pool based on the number of share submissions made. It starts at 65535 and adjusts up or down over time. With cgminer you can set a suggested starting difficulty using the "--suggested-diff" argument if 65535 is too high or low. It will automatically adjust up or down from there.

What password do I use?

The password is ignored and can be set to anything.

When do I get paid bitcoins?

Part of the reward is paid out as Pay Per Share (PPS). This amount is available for withdrawal immediately. The rest is paid out using the Double Geometric Method (DGM) and this is paid out when a block is found. This depends on pool hash rate.

Does the pool support access via TOR

Yes, the pool runs a hidden service on phkttm64gbquasaq.onion. You can access the website and mine on stratum using this service.

Why does blockchain.info show more blocks mined by this pool than the pool shows?

blockchain.info is inaccurate with regards to the pool they identify as finding a block. See this document explaining why this is the case and how to identify real pool blocks.

How do I change my coin addresses?

Coin addresses cannot be changed. They are immutable to prevent accounts from being hacked and changed. This means you must have access to the private key for your address or trust that any operator of services you use to hold your keys won't change them.

If it is required to change the keys for an absolute emergency you can contact the admins to begin a process of authenticating that you own the account. Don't expect this to be fast or easy. Plans are underway to add a standard account system for those users that prefer to have control over changing their keys.

What is the DGM reward method?

The Double Geometric Method is a reward system developed by Meni Rosenfeld. It aims to solve the issues caused by pool hopping while providing a reward system where variance is not too high for users and pool operators.

Some features to note of DGM:

Your earnings work like a capacitor. When you start mining it needs to charge so initial earnings are lower than expected. When fully charged they reach a normal level of earning. When you stop mining you continue to receive earnings until it is discharged. The end result should be equivalent to PPS.
Payments are made to your balance when a block is found. If the round is short you may get more than the PPS rate. If a series of long rounds occurs then your payments may be less than PPS. Overall it will average out
The risk to the pool is much lower making it more likely to survive while balancing with low variance for miners. These parameters (more risk to pool, less to miners) can be tweaked and we can adjust it over time.

What are the obfuscated usernames in the statistics?

The usernames in all the statistics are obfuscated to prevent easy guessing. They are the first 8 characters of the SHA256 of the username. You can see what your obfuscated name is in the user stats and use this to identify yourself in the statistics.

Can I get notification of hash rate drops or new blocks found?

This is available by the third party service bitmonitor.