See also: Capped PPS with Recent Backpay reward system

Yes, you must first configure your Namecoin address in My Eligius to be eligible to receive namecoins.

No registration is necessary. Just follow the instructions on the Getting Started page.

NOTE: should put a bit more info, I think this is the most confusing part of of the system..

Aka. we do not have a sign up page, you mine anonymously and we do not want any of your information blah blah blah

YES! Pool hopping is not punished. You will be paid your fair share just like everyone else.

Yes, but exit nodes are blocked. Please use http://xg3mjrqqxal4i5g7.onion:8337 to mine using our tor hidden service.

Yes! You may append an underscore _ and a short alphanumeric worker name to your bitcoin address and use this as your username. For example:

The stats for the workers will be shown appropriately on the stats pages.

Please don't use Eligius for illegal botnets. While we don't actively look to identify botnets, they often disrupt our services, and we are willing to provide full cooperation with law enforcement to tracking them down and putting criminals behind bars. We reserve the right (at our option) to make attempts to block botnets (legal or not) if they disrupt service (usually due to having a lot of CPU miners without noncerange support). If you would like to use Eligius for your legal botnet, please contact Luke-Jr for assistance in ensuring it doesn't disrupt service.

There is nothing we can do without a police report or request from applicable law enforcement. Please report this crime to your local law enforcement agency, and feel free to direct them to us for information or assistance. If you know the jurisdiction of a suspect, you may wish to report it to that jurisdiction's law enforcement as well.

Contact us with your request for information/assistance. If you wish to intercept "payouts" of the criminal's address, please include citation of the relevant laws authorizing such. Please be sure to include:

  • How to identify the miner you are investigating.
  • What information you are looking for.
  • A warrant, police report, or reasonable evidence the address is involved in a crime .

Information we can probably provide:

  • IP addresses doing work ("mining") for the address.
  • IP addresses accessing the address's (public) statistics and graphs..
  • Accurate date, time, and amount of all earnings made with this address.
  • General assistance with tracking these earnings through the Bitcoin network.
  • Some SMC routers have a buggy feature called "Gateway Smart Packet Detection"; turn this off
  • Make sure your using the proper url and port, see the top header section for the latest information
  • If your still having problems please contact us on Freenode IRC #eligius


Avast anti-virus has wrongly labelled the mining server as being infected.
First, please be sure to complain to Avast for their false positive.
Then, please head over to IRC #eligius for help working around the issue, if you do not wish to disable Avast until they have fixed it.

Some wallets, mostly online wallets, do not support payouts from the coinbase/generation transaction (directly mined).  This is a problem with the wallet software or site and is not a problem with Eligius.  We reccomend you use a wallet that supports all types of transactions, such as Bitcoin Core.

You are using an old version of poclbm, and your connection is slow. We recommend using the latest version of poclbm for best efficiency.

The "balance" shown by some interfaces to Eligius includes your estimated reward for the current block. If the pool runs out of funds, it will give what it gets to the most recent shares it hasn't paid yet and leave the rest in the share log. If your hashrate does not maintain the same percentage of the "last N shares", it is possible for your estimated portion to go down until the block is found. In this case, the pool will still remember your contribution, and include the difference in future rounds, which might be luckier and pay you for the shares found before.

Occasionally, two miners find a valid block at the same time. Since only one can be accepted by the network, they compete in popularity until another block is found. When that happens, the new block chooses which of the competing chains is valid. The other one becomes an orphan, or invalid, and in reality simply retroactively "never happened". Some graphs will show the true history, from when that block was believed to be real.

Yes, you can use as many miners as you want, all mining with the same username to the pool. In fact this is probably the normally expected behaviour.

You will enter the Payout Queue once you qualify for payout. This is when you have earned 40 TBC (0.04194304 BTC, configurable in My Eligius). Miners who stop mining and have zero new earnings for seven days will also enter the payout queue, subject to dust rules.

This feature was added to help miners avoid transaction fees. If you only earn 0.00001 BTC every round (common prior to minimum payouts), when you go to send someone 1 BTC, you will have 100,000 "input" coins. This will make your transaction have a large data size, which incurs fees to send. By delaying payouts until a reasonable average transfer size, the number of inputs can be minimized and fees incurred by the miner reduced or eliminated. Periodically, Eligius miners hold a poll to determine if the minimum payout amount should be adjusted.

Payouts are processed in 25 BTC chunks as blocks are found. The Payout Queue prioritizes qualifying payouts based on their age (oldest earnings not yet paid). As you continue to mine, your balance increases and so do those ahead of you already in the Queue, so you may be bumped into the next found block chunk of payouts.

The estimated payout queue can be accessed at Search for your payment address and it will show your approximate position and estimated payment amount. This is a dynamic listing and will change as mining progresses in the pool. Each block of estimated 25 BTC payment is separated by a dark line.

If the payout queue gets unreasonably long, the pool can manually send an old-fashioned transaction to pay off a large chunk of the buffer.

Please read it again: This is the Balance Age; The Balance Age shown is the time since you began earning toward your current balance. This is NOT when you will get paid. There is no specific way to determine when you will get paid since the time to solve a block varies by difficulty and variance ("luck").

Surplus Bitcoins are placed in the pool's reserve balance, which is stored in an offline wallet for manual payout when the pool cannot keep up with generating payouts at a quick enough rate.

Payments are “Generated” by the pool, these are freshly “minted” BTC. The pool sends you a Generated amount of BTC as per the Payout Queue, this is as if you generated the BTC in solo mining. These payments are yours, but not usable until they have "matured" at least 100 blocks. Most clients prevent spending until they reach 120 confirmations.

This depends on how fast blocks are generated in the overall Bitcoin network. By design, the rate should average 6 blocks per hour.

Whenever a block is found, the most recent 25 BTC (a CPPSRB round; one block reward/subsidy) worth of unpaid shares are paid.
Using the proportional concept of rounds, a long round results in the earlier shares being shoved into storage (shelved) rather than paid by the block, and a short round pays the entire round plus the most recent "storage" (shelved) shares found which were not already paid.

Compared to PPLNS, no share is ever paid twice, but old shares (that missed out on being rewarded due to poor luck in the past) have a chance to be paid when the pool is lucky.

When a block is found:

  • Go back 25 BTC into the share log, and reward those at PPS price. 
  • Delete those shares from the log 
  • If the entire database was paid and there are still funds left, include it in the next block's reward 

When a block is orphaned:

  • Undelete the shares rewarded for it

CPPSRB is a Maximum Pay-Per-Share reward system variant (MPPS). The pool will pay miners as much as is possible using the income from finding blocks, but the pool can never go bankrupt because of high variance and miners have lower variance overall than other reward systems, such as proportional, PPLNS, DGM, etc.

Shelved Shares are simply shares that you have somewhere in the full pool share log that are not yet close enough to the top of the share log to be paid when the next block is found.

CPPSRB shares are paid in a last-in-first-out order. When a block is found, the share log is processed from the top downward and shares are paid until one full block reward (25 BTC now) worth of shares are paid. If the current round is a "lucky" round (ie: it took less than 1*network_difficuly shares to find the block) then the top of the share log will contain shares from the current round AND some shelved shares from previous rounds, which will then be paid.
So the short answer is: Some amount of shelved shares are paid for every lucky block (on the stats page, a block with a luck > 100%). Depending on how far down in the share log your shelved shares are determines if they're paid by the current block or not. (See your userstats page and note the estimated change in shelved shares. Negative means that amount will be paid if a block is found now.) (In the works: Share log visualization)

No. The shelved shares are shares that pool itself never received any funds to pay in the first place. The only way shelved shares can be paid is as described above. (If someone of course wanted to donate bitcoins to the pool buffer, then of course more would be paid.)

With "straight PPS" the pool takes the risk of paying miners during unlucky rounds and recovering the losses during lucky rounds. with CPPSRB, the pool only pays miners as much as is possible during unlucky rounds, and makes up the difference through "shelved shares", which are paid during lucky rounds.

Since Eligius has no mining fees, your shares are put in the share log at 100% PPS. Over time, payouts will average out to as if you had mined at 100% "straight PPS", or close to it, depending on luck.
It is useful to note that it is statistically impossible to offer and run a 100% (or higher) "straight PPS" pool indefinitely, where CPPSRB can run indefinitely with no risk to the pool or miners of not being paid their fair share for their work.

Current transaction selection policy:

  • Both standard and non-standard transactions, including arbitrary P2SH, are mined if they pay a reasonable fee.
  • Probable spam incurs a penalty on transaction priority.
  • Dust, confirmed spam, "bare" multisig, and custom "dangerous" scripts will not be mined under any conditions.

New transaction selection policy decided from miners' meeting (not in effect yet, ETA unknown):

  • Standard payment transactions, including arbitrary P2SH, are mined if they pay a reasonable fee.
  • Data carrier transactions are permitted to be up to 80 bytes.
  • Address reuse and probable spam incur a penalty on transaction priority.
  • Blocks are filled gradually to 128 KB at a transaction fee rate of 0.1 TBC per 512 bytes.
  • Beyond 128 KB, transactions may be included if they offer a higher fee.
  • Non-standard transactions is selected only if it they have a higher-than-default fee (100 TBC/0.16777216 BTC per 512 bytes).
  • Dust, confirmed spam, "bare" multisig, and custom "dangerous" scripts will not be mined under any conditions.

Future plans are to have miners do their own transaction selection with GBT as soon as that becomes possible.