THIS TEST SOLO100.ORG WORKS ON TESTNET4.

⚠️ This is not a regular solo or proportional pool. Read every section carefully before you point your miner here — the payout model is fundamentally different and rewards are not guaranteed.

By the developer of SoloChance.org

solo100.org:
The most exciting Bitcoin pool to join.

Find the best quality share. Claim your spot in the best 100.
Split the reward equally.

10% Finder Bonus Best 100 Share Equally 2% Pool Fee SHA-256 · Stratum v1

Pool Status

Live
🌱
Pool is warming up

Stats will appear here once the pool is live. Check back soon.

Why solo100.org is awesome

🏆
How Each Block Pays Out
  1. 0.3125 BTC bonus to whoever finds the block
  2. 0.0275 BTC each to the 100 qualifying addresses in the Best 100 list that sent the top 100 best shares — 2.75 BTC total, split equally
  3. 0.0625 BTC pool fee (2%)

All outputs in coinbase — fully trustless.

💎
Quality Over Quantity
Only your single best share this round determines your rank. Higher hashrate means a statistically better chance of producing a high-quality share — but you don't need to outwork everyone, just outperform on one share.
🏖️
Mine When You Want
Once you're in the Best 100 list, you're free to stop. You'll collect your reward if and when a block is found — no need to keep mining. Just check your rank from time to time. If you've dropped below #100, fire up your miner again to reclaim your spot.

Quick Connect

Stratum testnet.solo100.org:3333

Rentals (Braiins / NiceHash): use port 4444

Username your BTC address.workername

e.g. bc1q…youraddress.bitaxe1 — no registration required

Password x

💡 It is statistically better to give each device its own Bitcoin address — not just a different worker name. Every unique address competes as an independent entry in the Best 100, giving each device its own shot at qualifying. See Strategies →

Connection Details

Stratum testnet.solo100.org:3333

Rentals (Braiins / NiceHash): use port 4444 —

Username YOUR_BTC_ADDRESS.worker1

Use your Bitcoin address as username. Append a worker name after a dot: bc1q…address.bitaxe1

Password x

💡 It is statistically better to give each device its own Bitcoin address — not just a different worker name. Every unique address competes as an independent entry in the Best 100, giving each device its own shot at qualifying. See Strategies →

Example Config

Pool Settings
Pool Configuration
Favourite Pools
Add new pool

minimum pool difficulty: >= 500000

cpuminer-opt \
  -a sha256d \
  -o stratum+tcp://testnet.solo100.org:3333 \
  -u YOUR_BTC_ADDRESS.worker1 \
  -p x
cgminer \
  --url stratum+tcp://testnet.solo100.org:3333 \
  --user YOUR_BTC_ADDRESS.worker1 \
  --pass x

Connection and Config Notes

⚠️  Large Coinbase Output with 102 payments — known problems:
solo100.org pays out 102 recipients per block — 100 Best 100 addresses, the block finder, and the pool fee. This makes our coinbase transaction unusually large. Some mining software and firmware cannot handle it and will fail to verify the pool or connect altogether.
NiceHash pool verificator may fail
The verificator will likely reject solo100.org. You can ignore it and save the pool anyway — but we haven't tested this ourselves yet. Let us know if it works for you in our Telegram channel.
NerdQaxe models may have connection issues
Known firmware bug. Fix expected in version 1.0.37 — update once available.
NerdNOS models do not work with solo100.org
Cannot connect or submit shares. Exact cause unconfirmed — most likely the same coinbase output issue. No fix available yet.

My Stats

Enter your Bitcoin address — it's also your mining username.

Current Best 100 Shares

Live

Only the best 200 addresses are shown here. If your address isn't listed, use to look up your best share.

# Miner Address Best Share Est. Payout Status
Loading…

Payout estimates assume current block value of 3.125 BTC. Actual payout depends on when (and if) the block is found.

Blocks Found

🧱
No blocks found yet.

solo100.org is still in beta and didn't find any block yet.

Strategy Tips

🔄  Rotate addresses once you've secured a strong share
Each address holds exactly one leaderboard slot. Once you're well inside the Best 100, extra hashing on that address does little. Switch to a fresh address to compete for a second slot — or continue regular solo mining and rejoin next round.
⚡  Short rental bursts beat sustained campaigns
Only the best 100 shares matter — not total work. A targeted burst of rented hash at the start of a fresh round is far more efficient than renting for the whole round. Use a fresh Bitcoin address for each rental — each address gets its own leaderboard slot. Since all 100 qualifying miners earn the same 0.0275 BTC regardless of rank, improving an already-secured slot doesn't increase your payout. Point that hash at a new address instead.
🏖️  Mine a little, park your spot, mine elsewhere
You don't need to mine here full time. All that matters is that your address is inside the Best 100 when a block is found. Mine enough to secure a spot, then point your hardware at another pool in the meantime — no pressure. Just check back occasionally to make sure you're still inside the cutoff, since new miners keep joining and the competition shifts over time.
🤏  Smaller miners punch above their weight here
A fleet of smaller machines under different addresses can hold multiple Best 100 slots simultaneously. More slots = more expected payout exposure per block found.
🚀  Join early in a fresh round
Right after a block is found the leaderboard resets and every slot is open. Even a modest share can land a top position before the field fills up. If the pool gets lucky and finds a block at low effort, early joiners benefit the most — check your position regularly to make sure you're still inside the Best 100 as the round progresses.
👁️  Watch the cutoff line
The Best 100 leaderboard shows where the cutoff sits in real time. If you're comfortably inside the top 50 on one address, start a second. If you're just outside, a short burst may push you in.
⏰  Your payout will arrive — but patience is required
When solo100.org finds a block, qualifying miners in the Best 100 will receive their Bitcoin directly to the address they mined with. However, newly mined coins (coinbase outputs) are locked by the Bitcoin protocol for 100 block confirmations — roughly 16–17 hours — before they become spendable. This is a Bitcoin consensus rule that applies to all mining pools worldwide, not something specific to solo100.org. If your wallet shows the coins but won't let you spend them yet, that's why. Please don't reach out on Telegram or X about this — it will resolve on its own.

What Can Go Wrong

solo100.org is in beta. Read these before you point your miner here.

🛠️  Pool downtime or bugs
solo100.org is in beta and extremely early in development. It is immature in several areas of pool software and management. Think of it as a hobby, an experiment, and entertainment. Join only if you are comfortable knowing it can go down or go wrong at any minute, in any way, definitively or indefinitely. Remember this a thousand times: this website, its software, and the individual behind it do not promise anything — at any level, in any context.
⏳  No block is ever found
Bitcoin mining is probabilistic. Even a pool with significant hashrate can go years without finding a block. solo100.org is a small pool — the expected time between blocks is long, and there is no guarantee a block will ever be found. Your shares earn nothing if no block is found.
📉  You fall out (or never been) of the Best 100 before a block is found
There are two ways this can happen.

First: if you are sitting in one of the last few positions in the Best 100, a stronger share from a new miner can push you out at any moment — including the moment just before a block is found. Only your rank at the exact instant the block is found determines your payout.

Second: even if you entered the Best 100 a second before the block was found, you may still not get paid. The 100 addresses are embedded in the coinbase output of the block template distributed to miners. If the block finder's device had not yet received the updated template with your address included — because the pool hadn't delivered it in time — your address will not be in the coinbase output of the winning block, and you receive nothing. If your address has been in the Best 100 for several minutes, this is not a risk for you — it only affects very late arrivals who entered the list moments before the block was found.

The first scenario is a real and likely risk, especially for ranks #98, #99 and #100. The second is a genuine edge case — don't expect it to happen.
📝  Wrong Bitcoin address
Payouts are coinbase outputs sent directly to the address you mine with. If you enter a wrong or misspelled address, the coins go to that address — permanently. solo100.org has no way to redirect or recover them. Double-check your address before you start mining.

FAQ

What is solo100.org?

solo100.org is a Bitcoin mining pool with a unique reward model, a SoloChance.org project. Instead of splitting the reward across all miners by total work, solo100.org rewards only the 100 miners who submitted the highest-quality shares in the current round — each earning an equal 0.0275 BTC (0.88% of the block reward). The block finder also earns a 10% bonus on top.

How is share quality measured?

Share quality is measured by difficulty — how close the share's hash is to satisfying the full Bitcoin network difficulty. Each miner is ranked by their single best share this round. Higher hashrate gives a statistically better chance of producing a high-quality share.

What if I'm not in the best 100?

Miners ranked #101 and below receive no payout for that round. The leaderboard resets every block, so every round is a fresh opportunity. Think of it like solo mining — but 100 people share the win instead of one.

Can one miner hold multiple slots?

No. Each Bitcoin address holds at most one leaderboard position, determined by its single best share. Running multiple distinct Bitcoin addresses gives each its own independent position — which is a valid strategy for maximising your expected payout.

When and how do I get paid?

Payouts are coinbase outputs — paid directly in the block your pool finds, to the Bitcoin address you mined with. No account or registration required. However, coinbase outputs are locked by the Bitcoin protocol for 100 block confirmations (roughly 16–17 hours) before they become spendable. This is a consensus rule that applies to every mining pool in existence.

What hardware do I need?

Any SHA-256 ASIC works — Antminer S-series, Whatsminer M-series, AvalonMiner, Bitaxe, etc. The pool uses standard Stratum v1, compatible with virtually all modern Bitcoin mining hardware and software.

What is the pool fee?

2% of each block reward — exactly 0.0625 BTC per block. This covers server infrastructure, development, and maintenance. No hidden fees or withdrawal charges.

Is this safe? Do I need to trust the pool?

You never deposit funds. You point your miner at the stratum server; if a block is found, payouts go to your Bitcoin address automatically. The only risk is opportunity cost — if no block is found this round, those shares yield nothing (same as solo mining). You can stop at any time.

I can see my payout in my wallet but can't spend it — why?

This is completely normal. Coinbase outputs — the direct payout from a mined block — are locked by the Bitcoin protocol for 100 block confirmations before they become spendable. At roughly 10 minutes per block, that's about 16–17 hours after the block is found. Your coins are safe; they just need to mature. This rule applies to every Bitcoin mining pool in existence and is enforced at the protocol level. Please don't reach out on Telegram or X about this — the wait is automatic and there is nothing anyone can do to speed it up.

Where is solo100.org located?

The pool server runs in Frankfurt, Germany. Invoicing and domain purchases are handled through Estonia, thanks to the Estonian e-Residency programme, which allows individuals to access EU digital services without being a resident. The operator lives somewhere else.

Why are all Bitcoin addresses public? Why not mask them until a valid share is found?

To be fully trustless, all payouts must be coinbase outputs — written directly into the block by the miner who finds it, with no pool operator touching the coins at any point. By the nature of that design, Bitcoin addresses must be declared upfront and are therefore public, just as they would be in any coinbase transaction on the Bitcoin blockchain.