Thanks! I've updated the first post and pool website to link to your service - looks great!

OMG we found a block! Pending at the moment, will confirm shortly.

Edit: Block confirmed and available for withdrawal.

BTCGuild has a higher hash rate than Slush and less variance as a result. This is why Slush pool rounds will vary more than BTCGuild's.

For the curious, these are the hash targets for the coins in the pool as of an hour ago:


The 'Best Hash' is the best hash solution during the last couple of days. This gives an idea of how 'close' we've been to finding a block. Almost, but not quite, a namecoin block. A fair bit away from a bitcoin one.

Pool down for some quick library upgrades for the openssl heartbleed issue.

Edit: And we're back.

For a coin to be added it needs to have the ability to be merge mined added by the coin developer. There aren't many around. Huntercoin and CoiledCoin are the two coins I know of that are merge mineable that the pool current doesn't mine. CoiledCoin has no exchange, interest or maintainer that I'm aware of. Huntercoin could be added. It's a bit of a resource hog so I'd need to do some minor server changes to do that.

The round is taking a long time in terms of elapsed time due to our low hash rate. It's taking a long time in terms of 'number of shares'/CDF due to bad luck. The pool is not  near it's longest round ever in terms of CDF or luck. It is currently about 3x difficulty in number of shares done. The pool has 8x difficulty before. Let's hope we don't have that again!

The reserves a pool needs to handle the swings of PPS are too much for it to be a consideration. Combine that with the block withholding attack risk that can drive the pool bankrupt it's not worth it.

I've considered this and I still may but I'm not sure referrals would work. The approach I had been considering was having share submissions of all referred customers count towards some tiered fee discounting or bonus. It's difficult finding some system that won't incentivize the wrong thing or result in users spamming every forum everywhere with referral URL's. Referrals did seem to work for Vircurex though. They also worked in the online poker industry. Maybe some ideas from the way they did 'rake back' are possible.

Thanks, I don't know how I missed doing that!

The pool is now running a tor hidden service on phkttm64gbquasaq.onion. You can access the website through that to view stats and use your miner through tor to mine. Something like the following works for me:


This is experimental and I'll adjust based on feedback.

The minimum withdrawal amount for bitcoin has been lowered to 0.005 BTC from 0.01 BTC.

Please update the entry for bitparking. The pool has changed name, domain and thread. The pool thread is https://bitcointalk.org/index.php?topic=559011. Verification of this account representing mmpool is available on http://mmpool.org/contact. New details are:

name: mmpool.org
Fee: 1.5%
Pay Tx reward: Yes
Variable difficulty: user defined
local work: stratum
pay orphans: no
min withdrawal: 0.005
merged mining: yes

The pool uses DGM with a small amount paid out via PPS to provide some income during blocks.

Done. New thread is here.

Note 2016-07-14: The pool continues to mine bitcoins but merge mining is temporarily disabled. No alt coins are currently being mined. Due to issues with the upgrade to recent bitcoin daemons and out of date alt coin code the pool needs some code changes before it can be re-enabled. This work is currently underway.

mmpool.org allows you to merge mine for a number of different bitcoin-derived virtual currencies. The pool provides the Pay Per Share (PPS) method for the alternate merge mined coins and the Double Geometric Method at a 1.5% fee for the bitcoin portion of the reward. Transaction fees in mined blocks are awarded to the miner that found the block. A portion of the DGM reward is paid out as PPS to provide a regular BTC income during long blocks.

• Stratum protocol for mining mmpool.org:3333
• DGM reward method
• All transaction fees paid to miner that finds the block
• No withdrawal fees
• 1.5% fee for bitcoin rewards
• Variable difficulty mining with automatic adjustment
• Temporarily disabled: Merge mining with Namecoin, Ixcoin, Devcoin, I0coin, Groupcoin, Unobtanium and Syscoin 2.0
• Simple registration. Just provide your coin payout addresses for the coins you want to receive.
• Access via TOR using hidden service phkttm64gbquasaq.onion
• Hashrate and block found monitoring available by the excellent bitmonitor service.

The pool broadcasts updates via bitmessage on address BM-NBs7aHtbw6x7beefygEC4Cv6Rsp2dZni and receives support requests on that same address. Email is actioned at admin@mmpool.org.

This account, user mmpool, is intended to provide support for mmpool on this forum. This can be confirmed via the contact page on mmpool.org. Unfortunately we can't change the topic title or first post details of this thread. Should we continue this thread or start a new one so details can be updated? Is it possible to have an ownership change of the thread to keep the history?

As outlined in the contact page the pool broadcasts updates via bitmessage on address BM-NBs7aHtbw6x7beefygEC4Cv6Rsp2dZni and receives support requests on that same address. Email is also actioned at admin@mmpool.org.

Regarding Mazacoin, it is not currently merge mineable. There have been quite a few requests for it as their marketing suggests it is. Huntercoin is an option to add but it's quite resource intensive as it is based on the old namecoin source code. That coin is also a bit of a resource suck. Most of the merge mineable alt coins have been moving to a newer code base based on the i0coin changes to reduce memory usage which has been very welcome.

Changes have been made, and more are in the pipeline, to make the pool more attractive to miners. I'm not sure this is actually possible in this new world of cloud hashing and China based ASIC pools but I'd like to keep the pool going. It needs more hash power. Missing an entire difficulty period is bad.

Some thoughts, inviting comment and other ideas:

• Tiered fee model for higher hashrate or higher difficulty miners - similar to what HHTT was doing.
• Normal accounts to allow changing of addresses easier
• Notification of miner hash rate drops. Although this is quite easily achieved via third party services it's still useful I think.