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1  Bitcoin / Development & Technical Discussion / Re: Data mining the blockchain on: September 29, 2013, 04:31:55 AM
What tools are you using? Interested in sharing your code?
2  Alternate cryptocurrencies / Altcoin Discussion / Re: how to get the coin include in block 1 ? on: September 21, 2013, 08:05:35 AM
no,not this problem

I just mined 3 block
but in wallet,only see 2 block,lost 1 block
3  Bitcoin / Development & Technical Discussion / Re: What are checkpoints in bitcoin code? on: August 26, 2013, 03:35:15 AM
Instead of checkpoints, client could hard-code a MAIN_CHAIN_MIN_POW variable.  This would be the PoW of the main chain when that version of the client was released.  All clients wouldn't need to agree on a value.  It is just a spam protection value.

Clients should download headers first and only commit blocks to disk that are on a chain that has PoW higher than the hard coded minimum.

Clients should respond to "inv" messages containing unknown block hashes by sending a "getheaders" message rather than asking for the block.

If the block extends your main chain, you will be sent it.

Peer sends: "inv" containing unknown block
Send to peer: "getheaders" with standard block locator (send at most once per inv message received)
Peer sends: "headers" with new blocks on it's main chain
Add these headers to header tree
If the main chain is extended and the main chain has PoW greater than MAIN_CHAIN_MIN_POW, request those full-blocks
No matter what happens, the longest chain will always have more PoW than the longest one when the client was writen, so the best chain is guaranteed to have more PoW than MAIN_CHAIN_MIN_POW.

The client won't consider itself synced unless it is on a main chain with PoW that exceeds that value.

And then what if multiple chains are above this min pow?
4  Alternate cryptocurrencies / Announcements (Altcoins) / Re: [XPM] [ANN] Primecoin High Performance on: August 03, 2013, 04:25:05 PM
Version 0.1.2-hp9 is finally out! (Download links are on the first page as usual.)

Here's the list of notable changes:
 * Sunny's mining optimizations from 0.1.2.

any need to uninstall the official 1.1 client and install the official 1.2 client prior to using hp9?
5  Alternate cryptocurrencies / Altcoin Discussion / Re: Proposal for Alternative Decimal Notation for Crypto Currencies on: August 02, 2013, 06:13:41 AM
This all seems ok on first glance, but now try to do some very basic math, such as addition and subtraction.
Quick what's 5|221 + 3|5?
6  Alternate cryptocurrencies / Altcoin Discussion / Re: Coinbase hires Charlie Lee, creator of Litecoin on: July 31, 2013, 07:54:24 AM
Or neutral...
7  Alternate cryptocurrencies / Altcoin Discussion / Re: [ANN] GAS Coin is dead and this is how r3wt scammed us and destroyed the coin on: July 29, 2013, 01:45:27 AM
sorry to hear what happened. while not all members of your team performed up to par, this should have been avoided with proper requirements verification and product testing. a team leader not only has to set the requirements of the project, but also is ultimately responsible for verifying that the product meets the requirements before letting the public use it. it's not easy to do by any means, so learn and keep trying Smiley
8  Alternate cryptocurrencies / Altcoin Discussion / Re: [XPM] Primecoin Built-in Miner Sieve Performance Issue on: July 13, 2013, 07:24:49 AM
0 blocks about 72 hours on 11 G Sandy dual core cpu`s; 2x i5 and 2 i7, i test every release.

something's severely broken in your setup - 20 systems here. Seeing avg 1 block/hr.

Which build are you using?
9  Alternate cryptocurrencies / Altcoin Discussion / Re: [XPM] Primecoin v0.1.1 Release - Windows Build Ready on: July 12, 2013, 08:29:50 PM
thanks for the official update sunnyking!

i'm interested in seeing this in an official build too:
seems that many are seeing a significant PPS increase with these optimizations
10  Economy / Computer hardware / Re: [WTS] IN-HAND Batch #1 Avalon (one of the first in the US) on: June 09, 2013, 07:06:16 AM
These can only do double sha256 and are not useful in mining scrypt based altcoins, correct?
11  Economy / Computer hardware / Re: [WTS] IN-HAND Batch #1 Avalon (one of the first in the US) on: June 09, 2013, 02:45:50 AM
Yes, I encourage everyone to do their own difficulty projections. Obviously, some people believe the ROI on things like the Block Erupter Blade/USB will make a positive return. Others don't care about ROI and simply want an ASIC to help protect the network. Different people have different reasons for wanting to get the latest technology. Please don't assume your motivations are the same as someone else's.

why are you selling it?
12  Economy / Computer hardware / Re: [WTS] IN-HAND Batch #1 Avalon (one of the first in the US) on: June 08, 2013, 07:56:47 AM
Here are the pictures and posts when I first got my avalon:

The machine works great and runs super stable.

Looking for 270 BTC.

Prefer local pick up in Northern California (bay area). If no one local wants to buy, I'll consider the next best offer.

For your reference:
ASICMINER blades are priced at 50BTC per 10-13GH
This Batch #1 just sold for 281 BTC:

Interested, but kinda pricey. How many coins have you mined in the past 3 mo?
13  Economy / Digital goods / Re: **FREE** Microsoft Office 2007 Retail Licenses **FREE** UPDATED!! on: June 08, 2013, 07:38:30 AM
If there are any remaining, I would like one please. Thanks!
14  Bitcoin / Hardware / Re: [ATTN] BitSyncom: What happened to my Batch 1 order? on: May 28, 2013, 03:55:31 PM
By creating my own topic like melmo with my early order number. Those were shitty days. I hope you guys get your units soon.

Did BitSyncom actually contact or PM you after that?  Just curious.

He replied in the thread soon after. You can find it all here:

Based on the date that you started your thread, and the date you received your unit, it's possible they shipped it after the thread was created. Hopefully it's a similar story for melmo? Not ideal, but it could be worse...
15  Bitcoin / Hardware / Re: Block Erupter USB Sales on: May 28, 2013, 06:54:34 AM
Has anyone done a rough return on investment estimate on these?

tldr: You'll never see the money back. Its like buying a 7790 but at double the cost.

Yea it does feel a little pricey for the hash rate, although these would use significantly less electricity.

It depends what you are looking for in return - pure money from mining Bitcoin? Best estimate I've seen is approximately 12-24 months to recover their cost, depending on what the difficulty does over that time.

If, however, you want them more as a novelty, or, as I and a work colleague will be, you are going to use them to teach your children a bit about the cryptocurrency, then you might value them differently!

I am talking about financial return from mining bitcoin. I am considering grabbing some for the novelty, but honestly just haven't done my due diligence on whether the price point makes sense as a financial investment.

Random thought: wouldn't these be even cooler if they could be daisy chained? I'd imagine the power draw of putting these in series would be prohibitive though...

16  Bitcoin / Hardware / Re: Block Erupter USB Sales on: May 28, 2013, 06:12:50 AM
Has anyone done a rough return on investment estimate on these?
17  Other / Beginners & Help / Re: Solar Powered Bit Mining on: May 22, 2013, 01:03:13 AM
I'm not using solar, but if I were, I would definitely go with an ASIC based solution; it's the most power efficient.
18  Alternate cryptocurrencies / Altcoin Discussion / Re: Litecoin Price on: May 21, 2013, 08:00:31 AM
Are you guys mining LTC at all?
19  Economy / Games and rounds / Re: [ANN] Coin ♥ Love ♥ Chest [FREE BITCOINS] on: May 21, 2013, 07:56:27 AM
I love bitcoins because they love proving work was done
20  Other / Beginners & Help / Re: Best market place to trade bitcoins? on: May 21, 2013, 07:51:59 AM
BTC-e might be your choise

Do you use them?
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