A random solo miner just walked away with 3.125 BTC (~$373,000) for mining block 907,283 completely on their own, through the Solo CK pool. That’s a win most miners can only dream of, while also being extremely rare.

This happened in late July 2025, and people are still trying to wrap their heads around just how improbable this really is. Here's a full breakdown of how this went down, what the odds are and why it’s technically possible but practically a miracle.

What actually happened?

• The miner was using Solo CK Pool, which lets people "solo mine" (that is, you submit valid shares as if you're trying to win the block reward all by yourself);
• Unlike regular mining pools where rewards are split among contributors, in Solo CK, you either get the whole block or nothing;
• In this case, the miner won 3.125 BTC (current block reward) + ~$3.4K in transaction fees, totaling over $376,000 at current prices;
• The Bitcoin network difficulty was at an all-time high: ~126 trillion. That means solving a block is harder than ever.

How rare is this exactly?

Reddit lit up with calculators and probability charts. Here’s what it boils down to:

Scenario 1 – Hobbyist Miner (~1 TH/s)

• Odds per block: ~1 in 260,000,000;
• There are 144 blocks per day → daily chance ≈ 1 in 1.8 million;
• Annual odds? ~0.02% chance, or 1 in ~5,000 per year;

If you’re running a BitAxe, FutureBit Apollo, or something similar, you're statistically looking at one success every 15,000–19,000 years.

Scenario 2 – Semi-Pro (1 PH/s)

• Odds per block: ~1 in 260;
• Annual success rate: ~20%, or 1 block per 5 years on average;
• But 1 PH/s requires serious infrastructure, electricity, and cooling (100+ ASICs);

Scenario 3 – Full-scale Mining Farm (100+ PH/s)

• Now you’re mining a block every day or two;
• But also burning thousands of dollars daily in electricity and hardware depreciation.

My point is unless you’re running an operation worth hundreds of thousands (if not millions), solo mining is more like buying a lottery ticket every 10 minutes.

The economic reality guys is that solo mining is almost never profitable!!!

Let’s say you’re running a 1 TH/s device that consumes 100W. Over a year:

• Electricity cost: 100W × 24h × 365d = ~876 kWh At $0.15/kWh → $131.40/year

So even if the rig is cheap (~$500), you’re paying yearly just to keep it running and you’ll almost certainly never hit a block. You’re losing money every year unless lightning strikes.

That said, what if you do hit?
You're getting 3000x return overnight. Like another fellow redditor on this sub said: "It’s the ultimate degen lottery."

Now, given all of the things talked above, why are some people still solo mining?

• Some do it to support Bitcoin's decentralization (proving individuals can still mine).
• Others want to experiment, learn, or just take a long-shot bet.
• Some treat it like playing slots: a small power-efficient rig running 24/7, just in case.
• Others want to avoid pool centralization (big players like Foundry USA control over 30% of the network hashrate).

And hey, this story proves it’s not impossible.

The bigger picture is the following:

This block win isn’t just about money. It’s a symbolic victory.

1. It proves Bitcoin mining is still open to everyone (technically).
2. It shows that, however small, decentralization is alive.
3. It reminds us that Bitcoin’s structure allows for some crazy edge-case miracles.

It's also a reminder to never unplug that miner sitting in the corner of your garage. You never know when your 19,000-year timeline might collapse into a single lucky night.

TL;DR

• Solo miner mined block 907,283 = $373K+ reward
• Estimated odds: 1 in 260 million per block (if 1 TH/s)
• It's like winning the lottery, but crypto-themed
• Community response = stunned, excited and deeply nerdy
• Proof that even in 2025, the little guy sometimes wins