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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head><script type="text/javascript" src="https://web-static.archive.org/_static/js/bundle-playback.js?v=7YQSqjSh" charset="utf-8"></script> <script type="text/javascript" src="https://web-static.archive.org/_static/js/wombat.js?v=txqj7nKC" charset="utf-8"></script> <script>window.RufflePlayer=window.RufflePlayer||{};window.RufflePlayer.config={"autoplay":"on","unmuteOverlay":"hidden"};</script> <script type="text/javascript" src="https://web-static.archive.org/_static/js/ruffle/ruffle.js"></script> <script type="text/javascript"> __wm.init("https://web.archive.org/web"); __wm.wombat("http://mining.bitcoin.cz:80/","20150307203517","https://web.archive.org/","web","https://web-static.archive.org/_static/", "1425760517"); </script> <link rel="stylesheet" type="text/css" href="https://web-static.archive.org/_static/css/banner-styles.css?v=p7PEIJWi" /> <link rel="stylesheet" type="text/css" href="https://web-static.archive.org/_static/css/iconochive.css?v=3PDvdIFv" />  <title> mining.bitcoin.cz</title> <meta http-equiv="content-type" content="text/html; charset=utf-8"/> <meta http-equiv="content-language" content="en"/> <meta http-equiv="imagetoolbar" content="no"/> <meta name="keywords" content="slush bitcoin mining pool"/> <meta name="description" content="Slush's bitcoin mining pool"/> <meta name="copyright" content="Copyright (c) 2012 bitcoin.cz All Rights Reserved."/> <meta name="robots" content="all"/> <meta name="MSSmartTagsPreventParsing" content="TRUE"/> <link href="https://web.archive.org/web/20150307203517im_/https://pool.r.worldssl.net/static/static/img/favicon5.ico" rel="icon" type="image/x-icon"> <link rel="stylesheet" href="https://web.archive.org/web/20150307203517cs_/https://pool.r.worldssl.net/static/static/css/main.css" type="text/css"/> <link rel="stylesheet" href="https://web.archive.org/web/20150307203517cs_/https://pool.r.worldssl.net/static/static/css/flags.css" type="text/css"/>  <script type="text/javascript" src="https://web.archive.org/web/20150307203517js_/https://pool.r.worldssl.net/static/static/js/jquery-1.4.4.min.js"></script> <script type="text/javascript" src="https://web.archive.org/web/20150307203517js_/https://pool.r.worldssl.net/static/static/js/jquery.dimensions.min.js"></script>  <script type="text/javascript"> var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-21278445-1']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 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This website will remain available at <a href="https://web.archive.org/web/20150307203517/http://old.bitcoin.cz/">http://old.bitcoin.cz</a>  </div> <script type="text/javascript"> $(document).ready(function () { height1 = $('#master').height(); height2 = $(window).height(); height3 = $('#left').height(); height = Math.max(height1, height2, height3); $('#master').height(height); $('#left').height(height); }); </script>  <div id="left" style="margin-top: 27px">  <a href="/web/20150307203517/http://mining.bitcoin.cz/" style="text-decoration:none;"><img id="logo" src="https://web.archive.org/web/20150307203517im_/https://pool.r.worldssl.net/static/static/img/Bitcoin_logo_Mining_White.png" title="Slush\'s bitcoin mining pool at Bitcoin.cz"/><span style="margin-left:159px;font-size:0.9em;">aka Slush's pool</span></a> <div id="menu"> <ul> <li> <a href="/web/20150307203517/http://mining.bitcoin.cz/">What is Pooled Mining?</a> </li> <li><a href="/web/20150307203517/http://mining.bitcoin.cz/accounts/profile/">My account</a></li> <li><a href="/web/20150307203517/http://mining.bitcoin.cz/stats/">Statistics</a></li> <li><a href="/web/20150307203517/http://mining.bitcoin.cz/stats/graphs/">Graphs</a></li> <li><a href="/web/20150307203517/http://mining.bitcoin.cz/news/">News</a></li> <li><a href="/web/20150307203517/http://mining.bitcoin.cz/stats/hall-of-fame/">Hall of Fame</a></li> <li><a href="https://web.archive.org/web/20150307203517/http://support.bitcoin.cz/Knowledgebase/List">Knowledge base</a></li> <li><a href="https://web.archive.org/web/20150307203517/http://www.bitcointalk.org/index.php?topic=1976.999999999">Forum</a></li> <li><a href="https://web.archive.org/web/20150307203517/http://webchat.freenode.net/?channels=mining.bitcoin.cz&prompt=1" target="_blank">Community chat</a></li> </ul> </div> <div class="langbar"> <a href="#" alt="English" lang="en"><div class="flag" id="flag-en" title="English"></div></a> <a href="#" alt="Deutsch" lang="de"><div class="flag" id="flag-de" title="Deutsch"></div></a> <a href="#" alt="Français" lang="fr"><div class="flag" id="flag-fr" title="Français"></div></a> <a href="#" alt="Русский" lang="ru"><div class="flag" id="flag-ru" title="Русский"></div></a> <a href="#" alt="česky" lang="cs"><div class="flag" id="flag-cs" title="česky"></div></a> <a href="#" alt="polski" lang="pl"><div class="flag" id="flag-pl" title="polski"></div></a> <a href="#" alt="Nederlands" lang="nl"><div class="flag" id="flag-nl" title="Nederlands"></div></a> <a href="#" alt="español" lang="es"><div class="flag" id="flag-es" title="español"></div></a> <a href="#" alt="Português Brasileiro" lang="pt-br"><div class="flag" id="flag-pt-br" title="Português Brasileiro"></div></a> <a href="#" alt="简体中文" lang="zh-cn"><div class="flag" id="flag-zh-cn" title="简体中文"></div></a> <a href="#" alt="Esperanto" lang="eo"><div class="flag" id="flag-eo" title="Esperanto"></div></a> <form action="/web/20150307203517/http://mining.bitcoin.cz/i18n/setlang/" method="post" id="langform" style="display:none;"> <input type="hidden" name="language" id="langform_lang" value="en"/> </form> </div> <script> $(document).ready(function() { $('.langbar a').click(function() { lang = $(this).attr('lang'); $('#langform_lang').attr('value', lang) $('#langform').submit(); }); }); </script> <div id="news"> <div id="trezor"> <br/> <a href="https://web.archive.org/web/20150307203517/https://www.buytrezor.com/"><img border="1" src="https://web.archive.org/web/20150307203517im_/https://pool.r.worldssl.net/static/static/img/trezor.png" alt="bitcointrezor.com" style="width:170px;height:270px;"/><a/> <br/><br/> </div> <br/> <span id="title">Quick updates</span> <ul> <li><strong>14.10.2014</strong><br/>Dear Bitmain Antminer S4 owners, we have had reports about incorrect hashrate being displayed in your profile. After investigating this issue, it turned out that the S4 firmware ignores difficulty lower than 2048. You can now set the minimum difficulty in the worker registration table. This ensures that our stratum servers will NOT attempt to give your workers lower difficulty than this threshold.</li> <li><strong>02.02.2014</strong><br/>Datacenter connectivity issues have caused short drop in the hashrate. The problem has been resolved and all stratum servers are now reachable. This all happened when 900 Th/s was within a reach. We will get there again with your support and participation in mining ;-)</li> <li><strong>17.01.2014</strong><br/>We were having an extremely lucky yesterday's mining session. Unfortunately, around 1.30 AM UTC, we were experiencing stratum server issues that eventually spread across all our stratum servers. The problem has been resolved now and mining continues.</li> <li><strong>13.01.2014</strong><br/>The pool database backend has been successfully migrated to a new hardware. The website is now fully operational. The whole migration process has been accomplished without interrupting the actual mining.</li> <li><strong>13.01.2014</strong><br/>We are currently migrating pool database to a new machine. Mining will continue without interruption, only website will be down for 1-2 hours.</li> <li><strong>18.12.2013</strong><br/>Pool has <a href="/web/20150307203517/http://mining.bitcoin.cz/news/2013-12-16-pool-celebrates-3rd-anniversary">0% fee</a> today.</li> <li><strong>15.12.2013</strong><br/><a href="/web/20150307203517/http://mining.bitcoin.cz/news/2013-12-16-pool-celebrates-3rd-anniversary">World's First Mining Pool Celebrates 3rd Year with 0% Fee</a></li> <li><strong>08.11.2013</strong><br/>Some recent payouts didn't go thru bitcoin network because of unsatisfied transaction fees. We're finding a soluton and all payouts will be processed soon</li> <li><strong>16.10.2013</strong><br/>In recent days we experienced some successful thefts of user's funds using compromised email accounts. <strong>We strongly encourage all users to change email passwords.</strong> There's no reason to think that pool security itself has been compromised.</li> <li><strong>08.07.2013</strong><br/>Getwork protocol support ended. Please be sure your miners support Stratum protocol. You can still use your old getwork miners with <a href="https://web.archive.org/web/20150307203517/http://mining.bitcoin.cz/mining-proxy-howto">Stratum proxy</a> installed on your mining rig.</li> <li><strong>21.05.2013</strong><br/>Bug in bitcoind caused many invalid blocks generated in recent hours. Thanks to cooperation with bitcoin developers, a bugfix has been deployed. Pool is now back in normal operation.</li> <li><strong>26.04.2013</strong><br/>Because the user database has been compromised in recent hack, please <a href="https://web.archive.org/web/20150307203517/https://mining.bitcoin.cz/accounts/settings/"><span style="color:#f00;">change password</span></a> to your pool account!</li> <li><strong>25.04.2013</strong><br/>Pool is recovering to normal operation from previous <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg1925445#msg1925445">attack</a>, delayed payouts will be processed in the afternoon (UTC).</li> <li><strong>18.04.2013</strong><br/>Pool is recovering from DDoS attack.</li> <li><strong>14.04.2013</strong><br/>As announced in <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg1524107#msg1524107">Getwork deprecation plan</a>, 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%!</li> <li><strong>12.03.2013</strong><br/>Bitcoin network recently experienced <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=152030.0">global problems</a> which caused some pool blocks to be invalid. Everything seems to be fixed now.</li> <li><strong>10.03.2013</strong><br/>Default mining URL for Stratum is <strong>stratum.bitcoin.cz:3333</strong>. If you're still using api.bitcoin.cz, please fix your URL to prevent fallback to deprecated Getwork protocol.</li> <li><strong>08.03.2013</strong><br/><a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg1601092#msg1601092">User-defined, per-worker difficulty</a> has been released!</strong> <li><strong>04.03.2013</strong><br/>Stratum proxy <a href="/web/20150307203517/http://mining.bitcoin.cz/mining-proxy-howto">version 1.5.2</a> has been released. This is bugfix release which add compatibility with some old miners (phoenix, Diablo).</li> <li><strong>03.03.2013</strong><br/>Stratum proxy version 1.5.0 has been released. All proxy users are encouraged to <a href="/web/20150307203517/http://mining.bitcoin.cz/mining-proxy-howto">update</a>.</li> <li><strong>13.02.2013</strong><br/><a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg1524107#msg1524107">Plan of removing the getwork support</a><br/> <li><strong>31.01.2013</strong><br/>ASIC mining become a reality. Jeff Garzik (bitcoin core developer) is <a href="https://web.archive.org/web/20150307203517/http://bitcoinmagazine.com/working-avalon-asic-confirmed/">testing first shipped unit of Avalon ASIC miner</a> on our pool.</strong> <li><strong>30.01.2013</strong><br/>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.</li> <li><strong>08.12.2012</strong><br/>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.</li> <li><strong>27.11.2012</strong><br/><a href="https://web.archive.org/web/20150307203517/http://bitcoinclock.com/">Only one day</a> 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 <a href="https://web.archive.org/web/20150307203517/http://mining.bitcoin.cz/mining-proxy-howto">miner with Stratum support</a>.</li> <li><strong>24.11.2012</strong><br/>Pool is now <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg1354066#msg1354066">giving transaction fees</a> to Stratum miners! Use miner with Stratum support (latest version of GUIminer, cgminer, bfgminer, poclbm) or use your favourite miner with <a href="https://web.archive.org/web/20150307203517/http://mining.bitcoin.cz/mining-proxy-howto">Stratum proxy</a> to improve your mining income!</li> <li><strong>19.11.2012</strong><br/>Guiminer with Stratum support has been released. <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=3878.0">Upgrade</a> is highly recommended.</li> <li><strong>12.10.2012</strong><br/>All users are encouraged to install or update Stratum proxy to current stable version 1.1.1. <a href="https://web.archive.org/web/20150307203517/http://mining.bitcoin.cz/mining-proxy-howto">Instructions are here</a>.</li> <li><strong>12.10.2012</strong><br/><a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=28402.0">New version of cgminer has been released.</a> Please update cgminer to version <strong>2.8.3</strong>, which fixes serious bugs introduced in previous versions.</li> <li><strong>10.10.2012</strong><br/>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.</li> <li><strong>20.09.2012</strong><br/><a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1334.0">New version of poclbm miner has been released.</a> All poclbm users are encouraged to update their miner, latest version includes major optimization.</li> <li><strong>11.09.2012</strong><br/>I'm seeking for beta testers of new mining protocol called <a href="/web/20150307203517/http://mining.bitcoin.cz/stratum-mining">Stratum mining</a>. If you want to join testing, please <a href="/web/20150307203517/http://mining.bitcoin.cz/mining-proxy-howto">download the proxy</a> and point your miners to it. Thank you!</a> <li><strong>08.07.2012</strong><br/>Do you have some bitcoins from the mining and do you want to sell them for cheap? Add your offer to <a href="https://web.archive.org/web/20150307203517/http://www.localbitcoins.com/">localbitcoins.com</a> and find a buyer in your neighborhood!</li> <li><strong>11.06.2012</strong><br/>Follow pool's <a href="https://web.archive.org/web/20150307203517/https://www.facebook.com/MiningBitcoinCz"><img src="https://web.archive.org/web/20150307203517im_/https://pool.r.worldssl.net/static/static/img/fb.png" style="display: inline;border:0;"/></a> page for recent updates and news!</li> <li><strong>05.02.2012</strong><br/>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.</li> <li><strong>26.01.2012</strong><br/>Pool is now supporting BIP 16 protocol extension, as described <a href="https://web.archive.org/web/20150307203517/https://en.bitcoin.it/wiki/BIP_0016">here</a>. It is just internal change on the Bitcoin network, miners don't need to update anything.</li> <li><strong>08.11.2011</strong><br/>Implemented <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg611014#msg611014">prioritization of long polling</a>. Fast miners should expect lower stale ratio.</li> <li><strong>10.10.2011</strong><br/><a href="/web/20150307203517/http://mining.bitcoin.cz/what-is-namecoin">Merged mining for Namecoins</a> added. Please fill NMC address on your profile to start collecting Namecoins! Accounting isn't finished yet, but will come very soon.</a> <li><strong>03.10.2011</strong><br/><a href="https://web.archive.org/web/20150307203517/https://en.bitcoin.it/wiki/Getwork#longpoll">Long polling</a> and <a href="https://web.archive.org/web/20150307203517/https://en.bitcoin.it/wiki/Getwork#rollntime">NTime rolling</a> features supported. Please <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg558715#msg558715">update your miners</a>!</li> <li><strong>01.09.2011</strong><br/>Bitcoin.cz is official sponsor of <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=40272.0">European Bitcoin conference 2011</a>. See you on 25.-27. November in Prague!</li> <li><strong>26.03.2011</strong><br/>Article: <a href="https://web.archive.org/web/20150307203517/http://www.newslobster.com/random/how-to-get-started-using-your-gpu-to-mine-for-bitcoins-on-windows">How to setup pooled mining in Windows</a></li> <li><strong>17.02.2011</strong><br/>Pool switched to <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg50002#msg50002">score-based rewarding system</a></li> <li><strong>14.02.2011</strong><br/>Second server added<br/>Total hashrate at 60Ghash/s</li> <li><strong>19.01.2011</strong><br/>We're over 20 Ghash/s</li> <li><strong>20.12.2010</strong><br/>4000 Mhash/s barrier behind us</li> <li><strong>16.12.2010</strong><br/>First two blocks found<br/>Over 1400 Mhash/s !</li> <li><strong>15.12.2010</strong><br/>Beta version released<br/>~600 Mhash/s</li> </ul> <br/> <span><a href="/web/20150307203517/http://mining.bitcoin.cz/terms-of-service">Terms of service</a></span> </div> </div> <div id="master"> <div id="content"> <div style="height: 27px"></div> <div id="register-now"><a href="https://web.archive.org/web/20150307203517/https://beta.mining.bitcoin.cz/accounts/register/">Sign up HERE</a></div>  <h2>What is Bitcoin Pooled Mining?</h2> <p> Bitcoin pooled mining is a way for multiple users to work together to mine <a href="https://web.archive.org/web/20150307203517/http://www.weusecoins.com/">bitcoins</a>, and to share the benefits fairly. </p> <h2>Why do I need bitcoin pool?</h2> <p> Bitcoins are ordinarily only ever created in chunks of 25 at a time, with the whole 25 paid to a single person. Furthermore, the race to get the 25 BTC prize in a given block is highly competitive. </p> <p> If you set out mining on your own, it may be a long time before you can make a return. Pooled mining allows you to receive smaller, more frequent, steadier payouts instead. If you have a slower computer, or a CPU miner, then pooled mining may be the only way that you will ever mine any bitcoins at all. </p> <h2>How does bitcoin pool work?</h2> <p> Our server gives users blocks of very low difficulty to solve. Each solution found is registered as one 'share'. Occasionally, a solution will happen to also meet the full-strength difficulty requirements of the Bitcoin network, resulting in a successful 25 BTC minting. </p> <p> This 25 BTC is divided among all of the users that contributed to that round, weighted by the number of shares that they earned. Therefore, the reward earned by a given user is given by the following formula: </p> <center>(25 BTC + block fees - 2% fee) * (shares found by user's workers) / (total shares in current round)</center> <p> Shares do not carry over from one round to the next. When the pool mine a block, only users who worked on that block are rewarded, and only for work they did on that block. This is an unavoidable consequence of the way that Bitcoin mining in general works. </p> <p>In fact the formula above is simplified. The real math behind the payout system is described <a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg50002#msg50002">here</a>.</p> <p> The 2% fee is used to keep this service alive. </p> <h2>Key features</h2> <ul> <li><strong>Service lifetime & operator trust</strong> - Users have to trust pool operators, because pools aren't cheat-proof from the side of the operator. <a href="/web/20150307203517/http://mining.bitcoin.cz/">mining.bitcoin.cz</a> was the first Bitcoin mining pool, has been operating consistently since December 2010 and has a long history of stable and accurate payouts.</li> <li><strong><a href="/web/20150307203517/http://mining.bitcoin.cz/stratum-mining">Stratum protocol support</a></strong> - Mining protocol with very low network overhead has been designed for high-speed ASIC miners.</li>  <li><strong><a href="https://web.archive.org/web/20150307203517/https://bitcointalk.org/index.php?topic=1976.msg50002#msg50002">Score-based reward system</a></strong> - Pool uses a fair distribution of rewards between members, making the pool hop-resistant. This has been mathematicaly proven.</li> </ul> <h2>How do I get started?</h2> <h3>1. Install Bitcoin miner on your computer</h3> <p>This mining software is currently supported:</p> <ul> <li>ckolivas's CGMINER (<a href="https://web.archive.org/web/20150307203517/http://www.bitcointalk.org/?topic=28402.0">instructions</a>)</li> <li>BFGminer (<a href="https://web.archive.org/web/20150307203517/http://www.bitcointalk.org/?topic=626361.0">instructions</a>)</li> </ul> <h3>2. Sign up with a bitcoin.cz account</h3> <ul> <li><a href="/web/20150307203517/http://mining.bitcoin.cz/accounts/register/">Sign up</a></li> <li>Verify email (may be used for troubleshooting)</li> <li><a href="/web/20150307203517/http://mining.bitcoin.cz/accounts/login/">Login</a> to application</li> <li>Enter your wallet address - We recommend to use <a href="https://web.archive.org/web/20150307203517/http://www.bitcointrezor.com/">TREZOR</a> or modern wallet software such as <a href="https://web.archive.org/web/20150307203517/http://www.electrum.org/">Electrum</a> or <a href="https://web.archive.org/web/20150307203517/http://www.multibit.org/">Multibit</a></li> <li><a href="/web/20150307203517/http://mining.bitcoin.cz/accounts/profile/worker-edit/">Register</a> your workers. You can use one worker account for all your miners, but I recommend to use separate account for every miner for easier troubleshooting.</li> </ul> <h3>3. Run miner</h3> <p> Run your own ASIC miner with the worker credentials you got earlier, and connect it to following URL: </p> <center> <strong>http://api.bitcoin.cz:8332</strong><br/> (Main pool URL) <br/><br/>or<br/> <strong>stratum.bitcoin.cz:3333</strong><br/> (If you have Stratum-compatible miner)  </center> <h2>Is it safe?</h2> <p> In theory, as the Bitcoin pool operator, I could keep the 25 BTC from a block found by the pool for myself. I'm not going to do this, but I completely accept that people do not trust the pool operator. It is their freedom of choice, and Bitcoin is about freedom. </p> <p> I created the Bitcoin pool service with the rising difficulty of mining in mind because I'd like to return my investment to mining hardware. There used to be days when I never found a block at all, even with the strongest GPU on the market, which made me uncomfortable. The periodic micropayments from the mining pool offer a steadier payout, which lowers the riskiness of my investment in the Bitcoin market. </p> <h2>About</h2> <p>You can contact me via email at info(at)bitcoin.cz, or via the bitcointalk.org forum at the username slush. You can also follow pool's <a href="https://web.archive.org/web/20150307203517/https://www.facebook.com/MiningBitcoinCz">Facebook profile</a> for latest news and updates.</p> <br/> </div> </div> </body> </html>