testnet reorganization

[amaclin]

I am too lazy to count the length of orphan chain after 51%attack reorganization.

Can anybody help me to count blocks in this side chain:
https://test.webbtc.com/block/0000000000af7aac1817b82d377fa989407d607dc1953d63827d8adfa39de85b

I want to know how many confirmations are enough to treat the blockchain immutable  

UPDATE:
... or may be side chain starts here?
https://test.webbtc.com/block/00000000008818f4b21dc6203b9c86f2c8b2aa694c0d46106a5e2baf93dcc691

[newIndia]

I want to know how many confirmations are enough to treat the blockchain immutable 

6 for the main chain. No idea why test chain would be immutable? There is no significant work done to secure its immutability!

[gmaxwell]

I want to know how many confirmations are enough to treat the blockchain immutable  

On testnet? infinity?

[sugarfly]

I want to know how many confirmations are enough to treat the blockchain immutable  

In a mixture of antonopoulos and carl sagan's voice:
"billions and billions of layers of snow"