I built a PoW blockchain where your phone mines at the same rate as high-end hardware (no pooling advantage) — 200+ signed up to run a node

Today, solo mining in most blockchains is practically impossible. Large players with massive hardware dominate.

If a solo miner succeeds, it makes headlines. That’s not what decentralization was supposed to look like.

**The problem (simple terms):**

Whoever has more hardware or capital wins.

**What I’m building**

r/GrahamBell is a new L1 where:

* Every miner (node) is capped at \~1 hash/sec
* No parallel mining advantage
* Each block’s work is independent (can’t be shared or pooled)
* Sybil identity creation is globally rate-limited and requires persistent network presence, making bulk scaling slow (time-gated), difficult and costly

So:

Phone = PC = ASIC

Winning = staying active over time, not having better hardware

**Why this matters**

Instead of stopping attacks, the system makes them:

* slow
* time-bound
* costly to sustain

Scaling influence requires time, not just capital or hardware.

**Current state**

I’ve built a browser-based MVP where you can:

* simulate mining
* try exceeding the cap (and see rejection)
* observe how enforcement works

No signup needed.

**Early Traction (all organic, 0$ spent on ads)**

* 922 visited the site
* 187 tested the MVP
* 3 Min 11 sec average engagement time per user on MVP
* 210 users signed up to run nodes at launch

**YouTube Demo:** [**https://youtu.be/i5gzzqFXXUk**](https://youtu.be/i5gzzqFXXUk)

**Try it:** [**https://grahambell.io/mvp/Proof\_of\_Witness.html**](https://grahambell.io/mvp/Proof_of_Witness.html)

**Looking for feedback**

Still early but I would appreciate thoughts from people here.

**Support would be appreciated:**

**If you’re interested in testing the P2P version when ready, sign up for free:** [**https://grahambell.io/mvp/#waitlist**](https://grahambell.io/mvp/#waitlist)

**Learn More:** [**https://grahambell.io/**](https://grahambell.io/)