After confirmation, we now can announce that the 2,000,000,000,000,000th bit (in binary) of Pi is 0
That should be the new record of the world!
The answer starting at the 1,999,999,999,999,997th bit (in binary) is:
0000 1110 0110 1100 0001 0010
   ^The 2,000,000,000,000,000th bit

Download the details of results here.

Meanwhile, we publish the source code. You can download it here.

Currently, the efficient data server received are sufficient to get conclusion.
We will close the download window but keep the upload window open. You can upload completed WUs and their scores will be calculated.
The upload window will be closed if no data are uploaded for three continuous days. We will also begin to analyze the data on that time.

We were originally going to release this file with the new client.
But since current project is about to finish, we will only release the language patch.

Installation Note:
1. Decompress the zip file and copy it to the "Pi Segment" directory to overwrite the file with same name.
2. Restart the client.

We will finish all the WUs if we keep current speed in a week. But actually we need possibly a little more time, because at the end of stage there may not be enoguh WUs for everyone to download.

Also, we will do following operations to keep the project to run smoothly:
1. Fix all the incorrect WUs. We will duplicate all the WUs whose results are wrong and you will find that there will be some more WUs.
2. Decrease the limitation of download number. As the credit of every participators will be down to 4000, one can only hold 40 WUs at most. In this way, WUs will be well distributed.
3. Enable WU duplication mechanism. The server will make a duplicate for a WU if it have not been uploaded for a certain time. However, if the former downloader upload the WU, server will accept it.

After the recent maintenance, some users have complaint to us that their machines were unable to download workunits. Here's a fix to it: you can simply restart the client to have this download problem fixed. This problem will be investigated. We apologize for the inconvenience.

For routine maintenance, server will be shut down for about 12 hours on Apr. 26th (UTC+8).
We suggest participators to download enough caches for computaion during that time.

The server was unexpectedly down from 18:12 yesterday to 8:36 today (Beijing Time, GMT+8).
We are analyzing the exact reason and it should be an error pf the operating system, according to currently known evidences.

The database perhaps has some incongruous data currently but it will be automatically convergent soon.

We are so sorry for this failure!

Due to the broken cables, some forums said that it's hard to display the signature of Pi Segment.
Thus, we temporarily shut down the signature in English and recommend XML link instead.

We've found a BUG:
Description: The over-stuffed cache may result in losing WU
Trigger condition: The number of WUs in local cache execeeds 200 (including uncompletetd and/or completed but not uploaded WU)
Affection: loss in credit
Solution: Please download Patch V1.4.0.2. Close the client first and overwrite the file with the files in the patch which has the same name, and then run client again.

Although the BUG had only affected a few users, we are so sorry about that!
If you encounter "not enough credit" because of this BUG, please contact pisegment@gmail.com

Thanks CaptainMooseInc and xieyun who noticed this BUG.

An earthquake near Taiwan have broken some optical fibers and the connection between Asia and some other regions has been down for a long time today.
The situation is just in the process of recovering, but the speed of navigation may decrease.

After login the website, you can find a link of XML to user stats and team stats on "My Account"->"User Info" page.
Generally, XML stats are refreshed every hour.

Merry Christmas and thank you for supporting Pi Segment!
Every participator will receive a gift: 10 reward score :)

As the server is stable enough now, we have removed upload and credit limits on teams creation.

Pi Segment has been formally deployed now.
Our target is the 2,000,000,000,000,000th bit of Pi (in binary).
Please download the latest client and start this challenge.

All positions are completed and validated.
We've added "upload"+"download" to "reward"

Now, we are opitimizing the database, so some pages cannot be visited correctly.
Please close your clients and wait for further informations.

We packed a wrong file in V1.0.7.2.zip and that may cause the client to upload wrong results
Please upgrade to V1.0.7.3 to solve this problem.
I'm very sorry for the inconvenience.

Client V1.0.7.2 is released, please download it to receive works of the new test

New features:
1、Fixed some BUGs
2、Use an external file to implement multi-language
3、Enable the selection of country/region when registering
4、Support CPUs without SSE instuction set

About the new test:
The main purpose of this test is checking if the new client works. If everything goes well, the project will be formally deployed after this test.

About the translation of client:
Please contact us if you are interested in translating the client into languages other than Chinese.

Currently all the workunits are completed. We have analyzed them:
The data match perfectly with the result obtained by PiHEX

We plan to release a new client recently and to perform a small test on it.
Then we will formally deploy the whole project.

Server has been migrated successfully.
All components of the server have successfully passed all basical tests.
If your client can not connect to server, please restart it.

If you've encountered any problem, please email to pisegment@gmail.com

If everything goes on well, we will perform a server migration in this week.
Since the server will be temporarily down for 6 to 12 hours at that period, we suggest that you should adjust the size of the cache to a proper value.

Moreover, we recommend you to modify the server address in client as soon as possible:
1. Exit the client first
2. Open the text file "config.ini" in the folder where the client is
3. Replace Line 2 "Server=pisegment.vicp.net" with "Server=www.pisegment.net"
4. Start the client again

Our formal domain was changed to www.pisegment.net . From now on please visit our website with this domain.
The former domains - pisegment.vicp.net and chinapi.vicp.net, though still available in these few days, will be disabled after server migration.

Thus, we recommend you to change the server address in the client as soon as possible:
1. Exit the client first
2. Open the text file "config.ini" in the folder where the client is
3. Replace Line 2 "Server=pisegment.vicp.net" with "Server=www.pisegment.net"
4. Start the client again

The current task will be completetd in a few hours and then we will analyze the result by comparing it with former data.
To improve the system in order to be more adaptable in deployment, we will add some new Work Units to prolong the test.

The server encountered a network failure at 11 on Nov 26th and recovered at 20 on Nov 26th.
The failure is due to ISP.
If your client still can't connect to server, please try to restart it.

We've released V1.0.6.0 in which we've fixed the database BUG found in V1.0.5.1. Download it here.

Recently we've found a critical bug in V1.0.5.1.
This error will occur when the client operates on the database.
Since this bug appears only in some non-Chinese OSs, it may be due to the different character sets on them.
We are trying to fix this bug and will release a new version soon.
For the testers who is running client V1.0.5.1, we recommend you to do the following:
1. Check the "Autorun" checkbox in the page "User" and make sure the autorun function is canceled.
2. Right click the tray button of the client, and then left click on the last item on the menu popped out(that should be "Exit" but we forgot to get it translated).
3. Wait for our new version.
We are terribly sorry for the inconvenience.

The server encountered a network failure at 9 on Nov 11th and recovered at 1 on Nov 12th.
As the server is unattended recently, we can't guarantee all faults fixed in time. So for testers, please raise your cache to a suitable value to reduce your loss of computational resources.

Client V1.0.5.1 is identical with V1.0.5.0 except that it has been translated into English.

The URL of this website has been changed to pisegment.vicp.net.
Google Analytics is applied to some pages.

The URL chinapi.vicp.net is also available now, but it is not recommended to be used.