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1  Alternate cryptocurrencies / Marketplace (Altcoins) / KNCminer Titan scrypt miner only 0.17BTC or 110USD per share for 1Mhs on: March 19, 2014, 02:12:54 PM
This is a groupbuy for KNC Titan scrypt miner. This is a brand new product from KnCminer https://www.kncminer.com/products/titan.
It has minimum 100/MH/s of performance.

GB #1
Total shares: 100. Each share represent 1Mhs.
Price per share in BTC: 0.17BTC to cover the miner, shipping and power of the miner.
Management fee: 2% of the total coin mined to cover electricity and etc.

How to join:
1. send BTC to the following address: 1GQv5Hse3BUkWmbKznt2Fwzg35xtaHGsmg.
or send $110 to emma.lee88@outlook.com for each share using none credit card transcation.
2. PM me the txid and the LTC address you want to receive the dividends.


Refund policy:
Refund will be issue in the following situations: 1. KnCminer fail to deliver the miner and issue a refund to me. 2. The total fund received by GB member cannot buy less than 1 KNCminer.

If you file a claim via Paypal, I will simply refund you and you will longer be in this groupbuy.
send fund using credit card will be refunded right away because I don't accept them. Using Paypal you have 45 days to regret. If you use credit card there can be 90-120 days to file charge backs, which means you can even file charge backs after this groupbuy pay you LTC. I just want to protect you and myself as much as possible.


About me:
To be honest, this is the first groupbuy I am organizing and I joined several groupbuys in the past year. I saw the Kncminer email me about the new scrypt miner, but I don't want to risk 10k myself to buy one machine and there is nobody organizing a groupbuy for this new miner currently.



Code:
Groupbuy #1
chenchunyu88   10 shares
2  Bitcoin / Bitcoin Technical Support / help needed Bitcoin stolen or missing? on: February 19, 2014, 07:53:42 PM
https://blockchain.info/tx/53c2dcafd2d4aae6165fe9b7a7608fde0965085bd4729c01e7d7375566a114ad
 This transaction is not made by myself and around 3.364 BTC gone. There are to possible reasons: 1. Bitcoin-Qt software doesn't work properly when experiencing hardware issue. 2. My computing get hacked.

Here is a little description about my settings: I have 2 windows 7 desktop running with the same bitcoin wallet. One desktop use local disk for the Bitcoin data (wallet, blocks, and etc.), the other use store the Bitcoin data on a network drive via iSCSI. I access these two PCs using teamviewer and require two password: the teamviewer password and the password for the machine. If anyone need to send money, he would need a 3rd password for the wallet. I thought this was secure enough.

What happen was I did a upgrade to my Synology DSM (the network drive) on Feb, 17, 2014 around 12:00 at noon. So basically there was an error for on bitcoin-qt saying that "it cannot access the data". I didn't really visited those two PC for 2 days and they stay running because a few miners are connected to them or use them as proxy. Today I found that about 3.364 BTC are sent to another address from one of my address and I think it almost drained the total amount of BTC in that address.

So I am wondering if it's hardware+software issue or some hacker issue.

If it's a hacker, why didn't he/she also steal BTC from other addresses in the same wallet. And why didn't he/she drain my litecoin wallet as well. And the BTC sent has never been spent. It doesn't make any sense.

If it's a hardware+software issue, do you think if there is any way to recover them.
3  Economy / Auctions / 4 shares for the KNCMiner groupbuy=~14Ghs on: November 27, 2013, 03:00:17 PM
I have 4 shares in this groupbuy for sell https://bitcointalk.org/index.php?topic=233624.0. This groupbuy is currently paying out dividend and the next payout date is Dec, 9, 2013.
The last payout of the 4 shares are 0.15BTC here https://docs.google.com/spreadsheet/ccc?key=0Ah5wT_NTrV00dG50NEF0NlZtYkQwRVFrTkI0R3ZmblE&usp=drive_web#gid=0

And the spreedsheet for the next payout is here https://docs.google.com/spreadsheet/ccc?key=0Ah5wT_NTrV00dE9FQ3BxYTV4d21vSnBrQmN1bTJLX1E&usp=drive_web#gid=0

The miner stats are here: http://eligius.st/~wizkid057/newstats/userstats.php/12LDtf1ufWRu6Wt5dAd7jbH6btEEGB38LT

The starting price is 0.2BTC. Auction last for 3 days. If you think you have a offer that I can reject PM me directly.

Auction end at 11:00PM, Dec, 30, 2013, Eastern Time in US.
4  Bitcoin / Group buys / KnCMiner 3Ths Neptune Groupbuy 1 share=0.3BTC=60Ghs on: November 26, 2013, 02:45:39 PM
KnCMiner Launches Neptune which is 3Ths.

There will be 50 total number of shares each contributing around $240, in total $12000 to cover the device, shipping, the power supply, and to look for a place that have enough electrical supply ("Cole believes that residential power supplies in some households wonít be able to handle it on a single fuse. ďAmerican houses donít have the same supply as Sweden or Germany for example,Ē he said.") and other costs.

Please act fast to buy the shares, I believe the first batch will be gone pretty soon.

Please send you BTC to the following address: 17hgxmr9Y2y651EatuqJEZGZsUYg3ecQaD

The hosting charge is 2.5% of the total mined BTC and electricity cost.

Signed message:
Code:
I hold this groupbuy of KNCMiner Neptune and I am responsible to buy and host the miner for this groupbuy.

Signature:
Code:
IKtM1XhKDbdy5eahZBFgdut7umxkoH2mwln49ET6UJG/iS3VqGK4bonrqcwmIV0vL0OiOJ+1vCJDO2X2PnOi9lo=

After sending the BTC, please reply or PM me to confirm the share. And a speedsheet will come out for the groupbuy in google docs pretty soon.

If you have concerns or thinking this is a scam, please leave quietly and just ignore this groupbuy. I am willing to let you see my ID once a payment is received using snapchat which doesnot allow you to store it.

If KNCMiner fail to deliver the Miner, refund will be issued based on $240, not on $0.3BTC because KNCMiner issue refund based on USD. If KNCMiner issue refunds otherwise, we will do it otherwise. So I suggest you if you have $0.3BTC already, please buy another one at current price to reduce the loss due to exchange rate.

This is a pre-order, please be patient until the miner ships.

Thank you.
5  Local / 中文 (Chinese) / OKcoin跑路了吗 on: November 19, 2013, 04:05:34 PM
客服一直都不回复,然后人民币提现1天都没到账,另外的交易所早就到了
6  Economy / Speculation / for those who have coinbase and btcchina account on: November 12, 2013, 03:33:12 AM
#realtime price difference between coinbase and btcchina with chart
#programmed in R
#please install R and required package before running the code

Code:
library(rjson)
library(RCurl)
require(tcltk)
n=10 #number of BTC you are trading
wu_fee=30 #fee that use western union to transfer money from China to US
diffs<-c()
count<-0
while(TRUE)
{


count=count+1
result = tryCatch({
tt<-fromJSON(getURL("https://coinbase.com/api/v1/prices/buy")) #get real time trading data
bc<-fromJSON(getURL("https://vip.btcchina.com/bc/ticker"))
}, warning = function(w) {
print("internet problem")
}, error = function(e) {
print("internet problem")
})
  

buy_price<-as.numeric(tt$subtotal$amount)
tx_fee<-as.numeric(tt$fees[[1]]$coinbase$amount)
bank_fee<-as.numeric(tt$fees[[2]]$bank$amount)

buy_total<-buy_price*n+tx_fee*n+bank_fee



sell_price<-as.numeric(bc$ticker$buy)
ex_rate=6.1
bank_fee_sell=0.01

total_sell<-sell_price*n*(1-bank_fee_sell)/ex_rate
diff<-total_sell-buy_total-wu_fee
print(diff)
if(diff>300) #alert trade if diff is greater than 300 USD, change it yourself as needed
{
ReturnVal <- tkmessageBox(title = "Trade Now",
   message = "Trade Now", icon = "info", type = "ok")
}
if(count>=500)
{
count=0
diffs=diffs[-c(1:400)]
}
diffs<-c(diffs,diff)
plot(diffs,type="l")
}
7  Bitcoin / Group buys / is anyone aware of this ASICMiner BOX on: November 11, 2013, 06:34:29 PM
http://translate.google.com/translate?sl=zh-CN&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fitem.taobao.com%2Fitem.htm%3Fid%3D18635057299&act=url

It's a 38Ghs machine sold at taobao.com for 1999 CNY, which is around 1BTC now.
8  Bitcoin / Mining speculation / speculation on the time of finding new blocks on: August 16, 2013, 05:26:09 PM
I am kind of wondering if there is method to estimate the time require to find a block when mining a specific block.

I am right now mining using aka Slush's pool. An interesting finding is that sometimes it takes hours (up to 10) to find a new block while other times it takes just few minutes.

If someone can estimate the time of each popular pools to find a new block at the beginning of mining, then we can switch pools to maximize the profit. I am wondering if it even possible to do that. Hope someone who knows clearly how bitcoin source code work and the mechanics of BTC can answer the question.

I am working on my PhD on Statistics so I am ready to write the prediction code once the parameters affecting the time of find new blocks are addressed. Hopefully we together can find some insights here and make a lot of BTC.   
9  Economy / Auctions / 8 USB Bitcoin miner 0.75 each total 6BTC on: July 25, 2013, 04:09:54 PM
I have 8 USB Bitcoin miner for 0.75 each total 6BTC. Only accept Bid for 4 or 8 USB miners. Shipping+insurance+handling=0.2BTC for each shipment.

So the total for 4 USB miner is 3.2BTC or for 8 USB miner is 6.2BTC.

To prove that I have the miners, two pics are attached.





Auction end today at 10:00PM EST. Please leave a reply in this post to join the auction.
10  Bitcoin / Mining speculation / hashrate estimation on: July 15, 2013, 08:47:43 PM
I used a statistical software called R to estimate the hashrate in the next 100 days from Jul, 15, 2013 using the last 180 days data from blockchain.info and the results are as follows:

And based on the estimates, 1GHs can generate around 1.29BTC on average situation without power cost deduction. In the worst case, you only get 1.09BTC and in the best case you can get 1.62BTC. So if you want to generate profit from mining, you have to buy 1GHs under 1BTC in a conservative view if you want your investment back in 100 days.

From the analysis, we are also expecting 1GHs generating 2.78BTC on average in the next year without power cost deduction. In the worst case, you only get 2.15BTC and in the best case you can get  4.398BTC. So if you want to generate profit from mining, you have to buy 1GHs under 2BTC in a conservative view if you want your investment back in a year.

         Point.Forecast   Lo.80                   Hi.80                   Lo.95            Hi.95
7/16/13   218414.1921   208164.4762   228663.9079   202738.6044   234089.7797
7/17/13   220950.0924   210289.2345   231610.9504   204645.7172   237254.4677
7/18/13   223485.9928   212389.6635   234582.3222   206515.6215   240456.3641
7/19/13   226021.8932   214466.6694   237577.1171   208349.7034   243694.0831
7/20/13   228557.7936   216521.1605   240594.4267   210149.3518   246966.2354
7/21/13   231093.694   218554.0303   243633.3577   211915.9333   250271.4547
7/22/13   233629.5944   220566.145   246693.0438   213650.7726   253608.4161
7/23/13   236165.4948   222558.3351   249772.6544   215355.1399   256975.8496
7/24/13   238701.3952   224531.3901   252871.4002   217030.2425   260372.5478
7/25/13   241237.2955   226486.0555   255988.5356   218677.2207   263797.3704
7/26/13   243773.1959   228423.0318   259123.36   220297.1458   267249.246
7/27/13   246309.0963   230342.9749   262275.2177   221891.0208   270727.1718
7/28/13   248844.9967   232246.497   265443.4964   223459.782   274230.2114
7/29/13   251380.8971   234134.1686   268627.6256   225004.3021   277757.4921
7/30/13   253916.7975   236006.5209   271827.0741   226525.3932   281308.2018
7/31/13   256452.6979   237864.0478   275041.348   228023.8108   284881.5849
8/1/13   258988.5983   239707.2087   278269.9878   229500.2576   288476.9389
8/2/13   261524.4986   241536.4311   281512.5661   230955.3874   292093.6099
8/3/13   264060.399   243352.1128   284768.6852   232389.8083   295730.9898
8/4/13   266596.2994   245154.6243   288037.9745   233804.0871   299388.5117
8/5/13   269132.1998   246944.311   291320.0886   235198.7521   303065.6475
8/6/13   271668.1002   248721.4952   294614.7052   236574.2963   306761.9041
8/7/13   274204.0006   250486.4783   297921.5229   237931.1804   310476.8208
8/8/13   276739.901   252239.542   301240.2599   239269.8354   314209.9665
8/9/13   279275.8013   253980.9506   304570.6521   240590.6654   317960.9373
8/10/13   281811.7017   255710.9517   307912.4518   241894.0492   321729.3543
8/11/13   284347.6021   257429.7782   311265.4261   243180.3429   325514.8614
8/12/13   286883.5025   259137.6491   314629.3559   244449.8816   329317.1234
8/13/13   289419.4029   260834.7711   318004.0347   245702.981   333135.8248
8/14/13   291955.3033   262521.3388   321389.2677   246939.9393   336970.6673
8/15/13   294491.2037   264197.5366   324784.8707   248161.038   340821.3694
8/16/13   297027.1041   265863.5387   328190.6694   249366.5438   344687.6644
8/17/13   299563.0044   267519.5104   331606.4985   250556.7093   348569.2995
8/18/13   302098.9048   269165.6086   335032.2011   251731.7746   352466.035
8/19/13   304634.8052   270801.9822   338467.6282   252891.9676   356377.6428
8/20/13   307170.7056   272428.7733   341912.6379   254037.5053   360303.9059
8/21/13   309706.606   274046.1171   345367.0949   255168.5945   364244.6175
8/22/13   312242.5064   275654.1425   348830.8703   256285.4326   368199.5801
8/23/13   314778.4068   277252.9729   352303.8406   257388.2081   372168.6054
8/24/13   317314.3072   278842.7262   355785.8881   258477.1014   376151.5129
8/25/13   319850.2075   280423.5153   359276.8998   259552.2852   380148.1299
8/26/13   322386.1079   281995.4485   362776.7674   260613.9249   384158.2909
8/27/13   324922.0083   283558.6297   366285.3869   261662.1797   388181.8369
8/28/13   327457.9087   285113.1587   369802.6587   262697.2021   392218.6153
8/29/13   329993.8091   286659.1315   373328.4866   263719.1389   396268.4792
8/30/13   332529.7095   288196.6406   376862.7783   264728.1316   400331.2873
8/31/13   335065.6099   289725.7751   380405.4447   265724.3163   404406.9034
9/1/13   337601.5102   291246.6207   383956.3998   266707.8244   408495.1961
9/2/13   340137.4106   292759.2604   387515.5609   267678.7827   412596.0386
9/3/13   342673.311   294263.7744   391082.8477   268637.3136   416709.3084
9/4/13   345209.2114   295760.24   394658.1828   269583.5358   420834.8871
9/5/13   347745.1118   297248.7323   398241.4913   270517.5637   424972.6599
9/6/13   350281.0122   298729.3237   401832.7006   271439.5083   429122.516
9/7/13   352816.9126   300202.0848   405431.7404   272349.4774   433284.3478
9/8/13   355352.813   301667.0835   409038.5424   273247.575   437458.0509
9/9/13   357888.7133   303124.3862   412653.0404   274133.9027   441643.524
9/10/13   360424.6137   304574.0572   416275.1703   275008.5585   445840.669
9/11/13   362960.5141   306016.1589   419904.8694   275871.6381   450049.3901
9/12/13   365496.4145   307450.752   423542.077   276723.2344   454269.5946
9/13/13   368032.3149   308877.8956   427186.7342   277563.4376   458501.1922
9/14/13   370568.2153   310297.6473   430838.7833   278392.3359   462744.0947
9/15/13   373104.1157   311710.063   434498.1683   279210.0148   466998.2166
9/16/13   375640.0161   313115.1974   438164.8347   280016.5578   471263.4743
9/17/13   378175.9164   314513.1037   441838.7292   280812.0463   475539.7866
9/18/13   380711.8168   315903.8337   445519.8   281596.5597   479827.0739
9/19/13   383247.7172   317287.4381   449207.9963   282370.1756   484125.2589
9/20/13   385783.6176   318663.9665   452903.2687   283132.9694   488434.2658
9/21/13   388319.518   320033.467   456605.569   283885.0152   492754.0208
9/22/13   390855.4184   321395.987   460314.8498   284626.3851   497084.4517
9/23/13   393391.3188   322751.5725   464031.065   285357.1497   501425.4878
9/24/13   395927.2191   324100.2688   467754.1695   286077.378   505777.0603
9/25/13   398463.1195   325442.1199   471484.1192   286787.1376   510139.1015
9/26/13   400999.0199   326777.169   475220.8708   287486.4945   514511.5453
9/27/13   403534.9203   328105.4586   478964.382   288175.5136   518894.3271
9/28/13   406070.8207   329427.03   482714.6114   288854.2581   523287.3833
9/29/13   408606.7211   330741.9239   486471.5183   289522.7901   527690.6521
9/30/13   411142.6215   332050.18   490235.063   290181.1706   532104.0724
10/1/13   413678.5219   333351.8373   494005.2064   290829.4591   536527.5846
10/2/13   416214.4222   334646.9342   497781.9103   291467.7143   540961.1302
10/3/13   418750.3226   335935.5081   501565.1371   292095.9935   545404.6518
10/4/13   421286.223   337217.5959   505354.8501   292714.353   549858.093
10/5/13   423822.1234   338493.2338   509151.013   293322.8482   554321.3987
10/6/13   426358.0238   339762.4571   512953.5904   293921.5332   558794.5144
10/7/13   428893.9242   341025.3009   516762.5475   294510.4615   563277.3869
10/8/13   431429.8246   342281.7992   520577.8499   295089.6853   567769.9638
10/9/13   433965.725   343531.9859   524399.4641   295659.2562   572272.1938
10/10/13   436501.6253   344775.8938   528227.3569   296219.2246   576784.0261
10/11/13   439037.5257   346013.5556   532061.4959   296769.6404   581305.4111
10/12/13   441573.4261   347245.0031   535901.8491   297310.5523   585836.2999
10/13/13   444109.3265   348470.2679   539748.3851   297842.0085   590376.6445
10/14/13   446645.2269   349689.3808   543601.073   298364.0562   594926.3976
10/15/13   449181.1273   350902.3722   547459.8823   298876.742   599485.5126
10/16/13   451717.0277   352109.2722   551324.7831   299380.1116   604053.9438
10/17/13   454252.9281   353310.1101   555195.746   299874.2101   608631.646
10/18/13   456788.8284   354504.9149   559072.7419   300359.0818   613218.575
10/19/13   459324.7288   355693.7153   562955.7423   300834.7706   617814.6871
10/20/13   461860.6292   356876.5394   566844.719   301301.3193   622419.9392
10/21/13   464396.5296   358053.4148   570739.6444   301758.7703   627034.2889
10/22/13   466932.43   359224.3689   574640.4911   302207.1655   631657.6945
10/23/13   469468.3304   360389.4286   578547.2322   302646.5459   636290.1148





code for the analysis
Quote
y<-RJSONIO::fromJSON(content="http://blockchain.info/charts/hash-rate?timespan=180days&format=json")
len=length(y$values)
hashrate=rep(0,len)
unix=rep(0,len)
for(i in 1:len)
{
   unix=y$values[][2]
   hashrate=y$values[][2]
}
plot(hashrate,type="l")

fit<-HoltWinters(hashrate,gamma=F)
library(forecast)
accuracy(fit)
forecast(fit, 100)
plot(forecast(fit, 100))
11  Bitcoin / Group buys / [Group Buy] 0.5BTC for 2.5GHs Kncminer Jupiter on: June 24, 2013, 03:31:01 AM
I know I am new to this forum but I'd like to start a group buy for the Kncminer Jupiter Miner

For more information, see: https://www.kncminer.com/products/jupiter

How this going to work?

The device is 350GH/s minimum and selling at 6,995.00. I designed the share as follows:

.5 BTC Minimum
.5 BTC = 1 Share (at current BTC/USD rates ~$100 )
1 Share = 350/140=2.5Gh/s (You need also deduct the gain against 2% fee and other expenses describe in Dividends section)
140 Shares total


The miner will be hosted in Michigan and I will provide a 24/7 monitoring service for you once the miner starts to work.

Dividends
Payouts will take place bi-weekly. I will send you your profits every 2 weeks to your designated address.

The fee will be 2% of your profit + (expenses include but are not limited to, electricity, repairs, shipping, taxes etc.)

Note* if you would like to sell your shares later there will be a 5% fee

In case of non-delivery:
In case KNC does not deliver I will do everything in our power to refund your (and our own) investments. I cannot guarantee this however. Buying these shares means you agree to not hold us responsible in case KNC does not deliver.

In case of hardware failure:
In case of hardware failure I will have KNC repair or replace the machine. Any costs involved will be deducted from payment as costs.

How to order?

Pay to this address: 1Bgo5AqGpA2af1VrwXsyz4nWR7ig5AkDej

* PM me/and post the transaction ID (txid) in this thread. **ONLY use sending addresses you fully control.** I will use the sending address for BTC payouts for your share ownership!

I also created a google docs to track the payment and dividends and I will update it frequently: https://docs.google.com/spreadsheet/ccc?key=0AtF8fHhn5HRtdE5aRkVfZmR1R0ZTYUtZaUJrb2o0WVE#gid=0

If you wish to pay by paypal, please PM me.

About Me
I am a personal miner myself, but I wanted to play something bigger and mine more bitcoins. And that's why I started this post. Bitcoin is build on trust and I hope people can trust on this first bigger shot.

Although mining bitcoin in this way seems to be profitable, nobody can guarantee it. Let's start our venture.

12  Other / Beginners & Help / can anyone sell me a acisminer usb device on: June 21, 2013, 05:19:51 PM
I am new to this forum and I cannot send msg to anyone to buy these, can you reply me you have one?
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