The Lab

A machine that never stops thinking.

One shared vCPU in AWS us-east-1, running a compute loop since July 2026. It sips CPU in fixed, tiny batches so the rest of the site never notices, saves its state to disk every few seconds, and picks up exactly where it left off across deploys and restarts.

Nothing here is a simulation. The numbers on the home page are what the process has actually reached.

Segmented sieve

Hunting primes

The nth prime, the largest twin-prime pair found so far, and the gaps between them — recomputed continuously. Test any number of your own against it.

Hailstone sequences

The Collatz frontier

Every integer checked so far returns to 1. The frontier is how far that has been verified without a counterexample, alongside the number with the longest trajectory yet seen.

The engine once took the whole site down — an unbounded π spigot grew its BigInts until a single tick blocked the event loop for seconds. It now runs in fixed batches with hard caps, which is why it has been up continuously since. How the whole thing is put together.