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Author Topic: BTC Mining Pools List  (Read 929329 times)
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August 30, 2012, 12:49:31 PM

This post is designed as a handy short cut to help you find your favourite pool's forum thread, or shop for a new pool. The hashrate is an average based on a pool's published statistics for the week, unless that pool does not publish round history on API or html, in which case it's the hashrate when the list was updated. I'll endeavour to add more pools as I can.

Mining luck FAQ:

If you are interested in alt-coins, try the Alt-coins Mining Pools List:

If any miners need more information than appears in the list, post here. If there are any mistakes, pool ops please reply in the thread.

NOTE FOR BITCOIN POOL OPERATORS: If your pool doesn't appear here please post the pool's statistics in the following format:

Pool:                      <Pool name>
Website:                 <Pool URL>
Proxy:                    Are you a proxy pool? Options: Yes / No
Generation address:  If you are not a proxy pool, what is the address to which block rewards are paid?
Coinbase signature: If you sign the coinbase, what string do you use to identify your blocks?
Payout method:        eg DGM, PPLNS, PPS
Fee:                        Percentage of reward taken as fee
Pay Tx Reward:        Do you pay the tx fees to the miners?
Vardiff:                   options: "User defined" or if automatic quote the shares per minute you're aiming at, eg "20 SPM"
Local Work:             options: stratum / gbt / p2pool
Pay Orphans:           Do you reward miners even if a block is orphaned? Options: Yes / no.
Min Withdrawal:       What is the minimum amount a miner can withdraw?
Merge Mining:          Options: Yes / No

Thank you to Meni Rosenfeld, whose Pool summary appears in the post below the current pools list.

Please refer to for pool features not listed here.

REDUCING REWARD VARIANCE You do not have to mine at only one pool. In order to reduce your income variance, you should mine at multiple pool. As well as reducing variance, this will also help decentralise the network. Details in this post:

If you are interested in p2pool specifically there maybe useful information here:

Recent pool support of Core, Unlimited and other (thanks to

P2Pool proxy mining pools

   Pay Tx         Pay   
PoolFeereward?Variable difficulty?   Local work?orphans?    Min withdrawalMerged mining?         1%      Yes      p2pool      p2poolNo      NA, hourly payoutYes (see post in this thread)         1.5%      No      User defined      StratumNo      UnknownNo         1.5%      Yes      Unknown      Stratum   Unknown      UnknownUnknown

DGM mining pools               
   Pay Tx         Pay   
PoolFeereward?Variable difficulty?   Local work?orphans?    Min withdrawalMerged mining?
      BTC         0%      No      20SPM / User defined       Stratum       No   0.001No         1.5%      Yes      12 SPM      Stratum   No      0.005Yes
PPLNS mining pools

   Pay Tx         Pay   
PoolFeereward?Variable difficulty?   Local work?orphans?    Min withdrawalMerged mining?         0.5%      Yes      12 SPM   Stratum   No      0.0001No
      BitClubPool         0%      No      18 SPM   Stratum   No      0.002No
      Bitminter         1%      Yes      20 SPM / user defined   Stratum   No      0.0001Yes
      GBMiners         0.9%      Yes      18 SPM    Stratum   No      0.01No         0%      Yes   16 SPM / user defined      Stratum   No      0.01Currently disabled
       Jonny Bravo's Mining Emporium         0.5%      Yes   12 SPM      Stratum   No      0.001 No
      Kano         0.9%      Yes      18 SPM   Stratum   No      paid out each blockNo
      p2Pool         0%      Yes      p2Pool      p2Pool   No      UnknownNo         0.5%      Yes      4 SPM   Stratum   No      0.001No

PPLNS variant mining pools

PoolFeePay TxVariableLocalPayMinMergedVariant
ckpool.org0.5%Yes18 SPMStratumNo0.0000546No[Link]

PPS mining pools

Be careful of low fee PPS-only pools that do not explain how they will afford to pay miners when the pool has a downturn in luck.

   Pay Tx         Pay   
PoolFeereward?Variable difficulty?   Local work?orphans?    Min withdrawalMerged mining?         4%      Yes      User defined    Stratum   Yes       0.00005Yes
      Discus Fish         4%      No      Dynamic    Stratum   Yes       0.0005Yes

PPS variant mining pools               
   Pay Tx         Pay   
PoolFeereward?Variable difficulty?   Local work?orphans?    Min withdrawalMerged mining?
      Eligius         0%      Yes    32 SPM      GBT & Stratum      Yes      UnknownYes

Proportional mining pools

   Pay Tx         Pay   
PoolFeereward?Variable difficulty?   Local work?orphans?    Min withdrawalMerged mining?
      Tricky's Bitcoin Pool         0%      Yes    Variable      Stratum / gbt    No      0.001No

Slush exponentially scored mining pools

   Pay Tx         Pay   
PoolFeereward?Variable difficulty?   Local work?orphans?    Min withdrawalMerged mining?
      Slush         2%      Yes      20 SPM      Stratum   No      0.01No

Solo-mining pools

   Pay Tx         Pay   
PoolFeereward?Variable difficulty?   Local work?orphans?    Min withdrawalMerged mining?
      Crypto-Miners Club         0.5%      Yes      12 SPM / user defined      Stratum   No 0.01No
      NiceHash Solo         0.5%      Yes   18 SPM   Stratum   No      1 block rewardNo
      Solo.ckpool         0.5%      Yes   18 SPM   Stratum   No      1 block rewardNo

Proxy mining pools

The pools do not solve blocks themselves, but send your work to other pools. You should make sure you are satisfied that they will not send your work to a pool you do not wish to support.

   Pay Tx         Pay   
PoolFeereward?Variable difficulty?   Local work?orphans?    Min withdrawalMerged mining?         3%      Yes      18 SPM      StratumYes      0.0005No
      NiceHash         2%      No      User defined      Stratum   Yes      0.0001No

Bitcoin network and pool analysis 12QxPHEuxDrs7mCyGSx1iVSozTwtquDB3r
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August 30, 2012, 12:50:15 PM

Summary of mining pool reward systems
Reproduced here with permission from Meni Rosenfeld

   PPS   Geometric   PPLNS   Double geometric   Proportional   Slush's   SMPPS   ESMPPS
Hoppability   None   None   Low/None   None   High   Medium   Low   Low   
Share-variance   Very low   Adjustable   Adjustable   Adjustable   Medium   High   Low   Low   
Pool-variance   None   Adjustable   High   Adjustable   High   High   Low   Low   
Maturity time   None   Low   Adjustable   Adjustable   Medium   Low   Very high   Very high   
Operator risk   High   Adjustable   None   Adjustable   None   None   None   None   
Variance+risk   High   High   Medium   Adjustable   Medium   High   Low   Low   
Variance+risk+maturity   Medium   Medium   Medium   Medium   Low   Medium   Medium   Medium   
Complexity   Low   Medium   Medium   High   Low   Medium   Medium   Medium   
Instability   Medium   Low   Low   Low   Low   Low   High   High   
Author's rating   4/5   4   4   4   1   3   2   2   

Attribute description
  • Hoppability: In hoppable pools, the attractiveness of submitting shares (in terms of expected return, variance and maturity time) varies based on the pool’s current state. Hoppers will take advantage of times of high attractiveness, leaving steady miners to suffer from more than the fair share of unattractive times. In hopping-proof pools, the expectation, variance and maturity time of the reward per share is always the same.
  • Share-variance: This is the variance (statistical deviation between the expected re- ward for a share and the actual reward) caused by the miner being too small or inter- mittent. Using a method with high share-variance does no harm to continuous large miners.
  • Pool-variance: This is the variance caused by the pool being too small. Using a method with high pool-variance does no harm to large pools.
  • Maturity time: This is the average time it takes to receive the due reward. High maturity time causes loss of the time value of money, and risk of the pool being discontinued before the rewards are received.
  • Operator risk: This is the risk the operator is taking in absorbing some of the pool’s variance. Operators of risky methods will require a relatively high fee as compensation, decreasing the expected earnings of participants.
  • Variance+risk: Mostly relevant for pools which can adjust variance and operator risk, this is their invariant total.
  • Variance+risk+maturity: Mostly relevant for pools which can adjust variance, risk and maturity time, this is their invariant total.
  • Complexity: The level of complexity in describing the method, implementing it and modeling its dynamics.
  • Instability: This is the probability of the pool’s collapse, and the severity of the event.
  • Author’s rating: The author’s opinion of the quality of the method, all things considered. 5 are the best methods, 1 is the worst.

Method description
  • Proportional: The block reward is distributed among miners in proportion to the number of shares they submitted in a round. The expected reward per share depends on the number of shares already submitted in the round, so hoppers will receive much more than their fair share and steady miners will earn much less. This is the worst reward system and must not be used.
  • PPS: Each share receives a fixed reward known in advance. This is the ultimate low- variance, low-maturity simple method, but has the highest risk for the operator, and hence lower expected returns than other methods and risk of collapse if not managed properly. It is currently only moderately attractive, but is the way of the future - it will be the most widely used method when the infrastructure to offer it with low fees is established.
  • slush’s method ([5]): Each share is rewarded with a score depending on when it was submitted (an exponential function of time), and block rewards are distributed among miners in the round in proportion to their score. It is historically the first method developed specifically to combat pool-hopping, though it is incomplete and some hopping is still possible. Contrary to a popular myth, the method is perfectly usable by intermittent miners and their long-term average returns won’t be affected. The variance for intermittent miners will be especially high, though.
  • Geometric method ([3]): This is a hopping-proof method based on a more accurate implementation of the principles set forth by slush’s method. Shares are rewarded with a score that decays exponentially as more shares are submitted. The operator takes a variable fee to maintain a steady-state history. The total variance in this method is high, though its distribution between the operator and miners is adjustable. PPS is a special case of this method where the operator takes all the variance.
  • PPLNS ([1]): Block rewards are distributed among the last shares, disregarding round boundaries. In the accurate implementation, the number of shares is deter- mined so that their total will be a specified quantity of score (where the score of a share is the inverse of the difficulty). Most pools use a naive implementation based on a fixed number of shares or a fixed multiple of the difficulty. The share-variance can be reduced at the cost of increased maturity time, but there is no way to decrease the long-term pool-variance. All implementations cannot be hopped using traditional methods. However, only the accurate implementation is hopping-proof against diffi- culty adjustments.
  • SMPPS: This method attempts to give shares the full PPS reward on a best-effort basis. However, when there is a backlog of due payments the maturity time is high. Hoppers can mine when the balance is positive and enjoy low-fee PPS, and leave when the balance is negative. The properties of stochastic processes guarantee that the negative balance will eventually become arbitrarily high, inevitably causing the collapse of the pool when it becomes unattractive to mine. This is exacerbated by the fact that any losses due to block withholding, invalid blocks and stale shares (if paid) cause the deficit to pile up.
  • ESMPPS ([6]): A refinement of SMPPS, where the least paid shares are prioritized. The total reward for a share converges to a steady-state ratio of the maximum long- term payment possible per share after losses. If this steady-state is accepted as the due expected reward, this keeps maturity time in check and prevents debt, measured up to the steady-state level, from piling up. However, the debt will still go arbitrarily high due to variance. The pool may survive this if the participants are loyal.
  • Double geometric method([2]): A hopping-proof hybrid between the geometric method and PPLNS, including the former and an exponential version of the latter as special cases. Shares decay exponentially with the number of future shares submitted and the number of blocks found. Round boundaries are crossed but not ignored. Maturity time, variance and operator risk are adjustable, with a low total invariant.

For a more comprehensive discussion of these methods, see [4].

[1] Pplns.
[2] Meni Rosenfeld. Double geometric method: Hopping-proof, low-variance reward system.
[3] Meni Rosenfeld. Geometric method: New cheat-proof mining pool scoring method.
[4] Meni Rosenfeld.   Analysis of bitcoin pooled mining reward systems, 2011.
[5] slush.
[6] TheSeven.

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