Here are some additional links:

To participate in the Collatz Conjecture: http://arithmetica.network/contribute#Collatz%20Conjecture

To define a new problem for others to work on: http://arithmetica.network/contribute

These links point to the version of Arithmetica that was submitted to ETHDenver. Since then , we have been working on refactoring and coming up with a scalable solution for saving state.

The project is open source and anyone is welcome to contribute, or fork. We welcome any questions/feedback.

One more thing, this is not an ICO. There is no token sale, no profit motive, we just want to democratize results from computation math and showcase what is possible with Ethereum/IPFS.