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• 26.04.2013
  Because the user database has been compromised in recent hack, please change password to your pool account!
• 25.04.2013
  Pool is recovering to normal operation from previous attack, delayed payouts will be processed in the afternoon (UTC).
• 18.04.2013
  Pool is recovering from DDoS attack.
• 14.04.2013
  As announced in Getwork deprecation plan, the hashrate on Stratum is far above 90%, so workers which are still using the deprecated Getwork protocol are now charged by 10% fee. Please update your software and start using modern Stratum miners to reduce your fees back to 2%!
• 12.03.2013
  Bitcoin network recently experienced global problems which caused some pool blocks to be invalid. Everything seems to be fixed now.
• 10.03.2013
  Default mining URL for Stratum is stratum.bitcoin.cz:3333. If you're still using api.bitcoin.cz, please fix your URL to prevent fallback to deprecated Getwork protocol.
• 08.03.2013
  User-defined, per-worker difficulty has been released!
• 04.03.2013
  Stratum proxy version 1.5.2 has been released. This is bugfix release which add compatibility with some old miners (phoenix, Diablo).
• 03.03.2013
  Stratum proxy version 1.5.0 has been released. All proxy users are encouraged to update.
• 13.02.2013
  Plan of removing the getwork support
  
• 31.01.2013
  ASIC mining become a reality. Jeff Garzik (bitcoin core developer) is testing first shipped unit of Avalon ASIC miner on our pool.
• 30.01.2013
  Native IPv6 address is now available. You can use ipv6.stratum.bitcoin.cz:3333 in your miner if your miners have IPv6 support! Please note that IPv6 works only for Stratum miners.
• 08.12.2012
  If you're using old miners from early 2011 or you're mining on URL "mining.bitcoin.cz:8332", please update your miners and use "api.bitcoin.cz:8332" in your configuration instead. Mining on URL "mining.bitcoin.cz" is not working anymore.
• 27.11.2012
  Only one day remains to halving block reward from 50 BTC to 25 BTC. Thanks to this change in Bitcoin world, mining income will be drastically reduced. As a countermeasure, pool is now paying block fees to miners. Everything you need to collect block fees is to use miner with Stratum support.
• 24.11.2012
  Pool is now giving transaction fees to Stratum miners! Use miner with Stratum support (latest version of GUIminer, cgminer, bfgminer, poclbm) or use your favourite miner with Stratum proxy to improve your mining income!
• 19.11.2012
  Guiminer with Stratum support has been released. Upgrade is highly recommended.
• 12.10.2012
  All users are encouraged to install or update Stratum proxy to current stable version 1.1.1. Instructions are here.
• 12.10.2012
  New version of cgminer has been released. Please update cgminer to version 2.8.3, which fixes serious bugs introduced in previous versions.
• 10.10.2012
  In effect from 01.11.2012, pool increases the lower limit for payouts ("send threshold") to 0.05 BTC (around $0.6) as a protection against high transaction fees for tiny payouts. If you have a balance of less than 0.05 BTC and want to withdraw them, please do so before November 1.
• 20.09.2012
  New version of poclbm miner has been released. All poclbm users are encouraged to update their miner, latest version includes major optimization.
• 11.09.2012
  I'm seeking for beta testers of new mining protocol called Stratum mining. If you want to join testing, please download the proxy and point your miners to it. Thank you!
• 08.07.2012
  Do you have some bitcoins from the mining and do you want to sell them for cheap? Add your offer to localbitcoins.com and find a buyer in your neighborhood!
• 11.06.2012
  Follow pool's page for recent updates and news!
• 05.02.2012
  poclbm/GUI miner is affected by serious bug. If your miner is crashing on 'unexpected error' message, please follow miner forums for the newest versions.
• 26.01.2012
  Pool is now supporting BIP 16 protocol extension, as described here. It is just internal change on the Bitcoin network, miners don't need to update anything.
• 08.11.2011
  Implemented prioritization of long polling. Fast miners should expect lower stale ratio.
• 10.10.2011
  Merged mining for Namecoins added. Please fill NMC address on your profile to start collecting Namecoins! Accounting isn't finished yet, but will come very soon.
• 03.10.2011
  Long polling and NTime rolling features supported. Please update your miners!
• 01.09.2011
  Bitcoin.cz is official sponsor of European Bitcoin conference 2011. See you on 25.-27. November in Prague!
• 26.03.2011
  Article: How to setup pooled mining in Windows
• 17.02.2011
  Pool switched to score-based rewarding system
• 14.02.2011
  Second server added
  Total hashrate at 60Ghash/s
• 19.01.2011
  We're over 20 Ghash/s
• 20.12.2010
  4000 Mhash/s barrier behind us
• 16.12.2010
  First two blocks found
  Over 1400 Mhash/s !
• 15.12.2010
  Beta version released
  ~600 Mhash/s

What is Namecoin?

It's a new blockchain which uses namecoins for registering domain names. The namecoin DNS data is stored in blockchain and is shared by all p2p nodes.

How it is possible to mine together Bitcoins and Namecoins?

Mining involves a finding a solution for some hash. The hashed data contains: a coinbase (bytes that uniquely identify coins mined in current block, and usually is just a random string) and a merkle root (bytes that contain a history of all transactions). This data is mixed together to form a 'midstate' which is the input data for hashing algorithm. NMC mining is merged with BTC mining by taking the NMC 'midstate' and using it as coinbase for BTC. From BTC point of view the coinbase is still a random string, but from NMC point of view it's the data that - once BTC is solved - will confirm an NMC block. The point here is that NMC usually has lower difficulty, so NMC blocks are solved more frequently with the same shares submitted than BTC blocks.

This basically means that NMC can be mined "for free" while mining BTC. The pool will mine NMC with full power, and mined NMC will be divided between users who filled in a valid NMC wallet.

This is important, if you don't fill in a valid NMC wallet, you will NOT get any Namecoins, but instead people who filled in a correct wallet, will get some extra namecoins!

So now, please head on to your user profile page and fill in your NMC wallet :)

How to use namecoins

Exchange on market for BTC

You can improve your Bitcoin income by selling mined Namecoins for Bitcoins on the most popular BTC/NMC exchange: http://exchange.bitparking.com

Buy domains

Registering new domains is done here http://register.dot-bit.org/ or if you want to do it by yourself it's explained here http://www.bluishcoder.co.nz/2011/05/12/namecoin-a-dns-alternative-based-on-bitcoin.html.

Namecoin dns server

To use the namecoin DNS on your computer you will need to use a namecoin registrar DNS server, a popular one is http://register.dot-bit.org/ just add its IP to your DNS config (e.g. resolv.conf in Linux). To make NMC DNS compatible with current DNS protocol it has to use some TLD (top level domain) and a .bit domain is currently used for that, but it's configurable.

Also see: http://namecoin.bitcoin-contact.org/ and http://wiki.opennicproject.org/ConfiguringYourComputer

Useful links

• 1. http://dot-bit.org/Main_Page
• 2. http://dot-bit.org/InstallAndConfigureNamecoin
• 3. http://dot-bit.org/tools/
• 4. http://www.bluishcoder.co.nz/2011/05/12/namecoin-a-dns-alternative-based-on-bitcoin.html
• 5. https://exchange.bitparking.com/main - namecoin exchange
• 6. http://dot-bit.org/forum/ - in case of any problems it's always good to ask on the forum