Polymath3

Polymath3 has started. There is a wiki here. There is a thread on Math Overflow here and also a tag here. Let me update this there is a new thread here. Let me update further there is a third thread.
There is another new thread.

Polymath5

There is a new thread for Polymath5 here. The pace seems to be picking up for Polymath5 since the beginning of September there have been several threads and over a hundred and fifty total comments to those threads.

Polymath4 Paper

“Deterministic methods to find primes” is online here. It is a paper resulting from the Polymath4 project. Let me update this the paper has been accepted.

Polymath5

There is a new thread for Polymath5 here. Let me update this there is another thread here. And yet another here.