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Computer scientist Ken Shirriff programmed an Apollo Guidance Computer to mine bitcoin. This was the onboard computer developed to navigate NASA’s Apollo spacecraft and control their engines during missions to the Moon. It weighed about 70 pounds and had roughly 4 KB of RAM. This particular unit never flew... in space. Its owner had bought it from a scrapyard in the 1970s after NASA discarded it. Shirriff wrote custom code to make the 1960s machine perform SHA-256, the calculation used in Bitcoin mining. One calculation took 5.15 seconds, implying approximately 10.3 seconds for Bitcoin’s double hash. At the network difficulty in 2019, he estimated that finding a new block would take, on average, roughly a million times the age of the universe. His demonstration used a block that had already been mined. The computer reproduced the calculation; and never did earn bitcoin.show more

Documenting ₿itcoin 📄

1,125,967 subscribers

35,537 views • 22 days ago •via X (Twitter)

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24 Comments

SHATOSHI22 days ago

Four kilobytes of RAM and still pointed at the right monetary network. Modern machines have more memory than conviction.

Nilesh Maurya22 days ago

Hashrate does not remember where the silicon came from. What compounds is electricity plus the ASIC learning curve, so a guidance computer hashing every few seconds is a tour of sunk cost, not a bid for block rewards. Price miners on power contracts and machine payback, not on how charming the hardware is.

LoopThatMarket22 days ago

Fun project but it's not a network story. The hashrate is on modern ASICs, not on a box that got us to the moon.

Macro Bombastic22 days ago

man 5 seconds per hash and i still complain about my laptop

Cy21 days ago

space and btc .. i like

YonLe22 days ago

Even on 4KB that machine could hash. Protocol's constraints have always been the real feature.

KhaiDao22 days ago

the agc hashing at 10.3 seconds per hash means a single block would take longer than the universe is old, no joke that's the real killshot here. 4kb ram and it still outmines my old laptop on a good day.

Gems Trending | All Chain 💸22 days ago

4 KB RAM mining bitcoin is such a rude flex on modern bloat

Nils Domke 🇩🇪22 days ago

Mining bitcoin on a 70-pound Apollo flight computer with 4KB of RAM quietly proves the protocol never cared about fancy hardware.

Crypto Lounge22 days ago

Apollo Guidance Computer mining BTC is peak hash-history theater — proof the network still runs on the same scarcity math, even when the hardware is museum-grade.

Kasper Dolberg21 days ago

that’s an interesting way to waste a lot of time for nothing

nek22 days ago

The contrast is perfect: Bitcoin’s protocol can run on tiny hardware, but profitable mining is an energy-and-ASIC efficiency race. Decentralization comes from permissionless verification; industrial mining economics are a separate moat.

Hymple | Hybrid Exchange22 days ago

From navigating humans to the Moon to mining Bitcoin. 🚀₿ Same machine, decades apart — a powerful reminder of how far computing has come.

Plutus Crypto22 days ago

That works out to about 0.1 hashes per second. A modern ASIC does roughly 250 trillion, so the gap is around 2.5 quadrillion to one. Fifty years of hardware and the algorithm did not change once.

Crypto Lounge22 days ago

Cool piece of hardware history, but it never touched the hash market. One SHA-256 pass every few seconds on 4 KB of RAM is a museum demo. Security is still priced by hashrate, difficulty, and miner margins.

Johntoshi Lockemoto22 days ago

Moonlandings were fake and gay.... So......

Jayden22 days ago

10 seconds a hash and it still made 0 btc. scrapyard moon computer doing sha256 is the whole joke

Follow me for news22 days ago

apollo's moon computer just mined a sat.

Omega22 days ago

4KB of RAM and they still managed to crash the whole crypto market with their Bitcoin mining venture.en Hua

Hedge Street22 days ago

Apollo Guidance Computer mining $BTC is peak engineering flex. Also a reminder how far hashpower's come — weekend tape near 81k still cares more about ETF creations than nostalgia.

Mary King22 days ago

That's a crazy piece of nostalgia combined with modern computing power!.

OSATO22 days ago

Cute mining history is optics. The market still pays whoever can stay liquid when the tape gets ugly.

Patient Stacker22 days ago

A Moon computer taking 10 seconds per hash is a great reminder. Bitcoin was never about speed. It was about a machine that keeps counting when nobody is watching.

MiguelGeo22 days ago

This got them to the moon and back.

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162,379 views • 7 months ago

The man who invented modern fantasy didn't publish his first novel until he was forty-five. By that age, J.R.R. Tolkien had already built a respectable life. He was an Oxford professor, an expert in ancient languages, with a wife and four children and a settled academic career. He was exactly the kind of man who might reasonably have decided that the shape of his life was already fixed. The work he would be remembered for, he had not yet even begun... The story, which Tolkien told himself, is that one summer he was grading examination papers, when he turned a page and found that a student had left it blank. Without quite knowing why, he wrote a single sentence on it: "In a hole in the ground there lived a hobbit." He did not know what a hobbit was. He had spent years inventing languages and mythologies as a private passion, and telling stories to his own children, never imagining any of it would reach the world. But that one line began to grow. It became a story, and then a book, and in 1937, at the age of forty-five, Tolkien published The Hobbit. It was a success, and his publisher asked for a sequel. Tolkien warned them it might take some time. It took 17 years... He wrote it in the margins of a demanding full-time job, revising endlessly, doubting it often. When The Lord of the Rings was finally published, in 1954 and 1955, he was in his early sixties. That book, begun as a middle-aged professor's private side project, went on to sell well over a hundred million copies, to invent modern fantasy as we know it, and to reshape the imagination of the entire world. Tolkien already had a full and respectable life behind him. And still, the thing he is remembered for, the thing that outlived him and reached hundreds of millions of people, was something he began at forty-five, at an age when it would have been the easiest thing in the world to tell himself he had already missed his chance. He didn't. It's never as late as it feels.

The man who invented modern fantasy didn't publish his first novel until he was forty-five. By that age, J.R.R. Tolkien had already built a respectable life. He was an Oxford professor, an expert in ancient languages, with a wife and four children and a settled academic career. He was exactly the kind of man who might reasonably have decided that the shape of his life was already fixed. The work he would be remembered for, he had not yet even begun... The story, which Tolkien told himself, is that one summer he was grading examination papers, when he turned a page and found that a student had left it blank. Without quite knowing why, he wrote a single sentence on it: "In a hole in the ground there lived a hobbit." He did not know what a hobbit was. He had spent years inventing languages and mythologies as a private passion, and telling stories to his own children, never imagining any of it would reach the world. But that one line began to grow. It became a story, and then a book, and in 1937, at the age of forty-five, Tolkien published The Hobbit. It was a success, and his publisher asked for a sequel. Tolkien warned them it might take some time. It took 17 years... He wrote it in the margins of a demanding full-time job, revising endlessly, doubting it often. When The Lord of the Rings was finally published, in 1954 and 1955, he was in his early sixties. That book, begun as a middle-aged professor's private side project, went on to sell well over a hundred million copies, to invent modern fantasy as we know it, and to reshape the imagination of the entire world. Tolkien already had a full and respectable life behind him. And still, the thing he is remembered for, the thing that outlived him and reached hundreds of millions of people, was something he began at forty-five, at an age when it would have been the easiest thing in the world to tell himself he had already missed his chance. He didn't. It's never as late as it feels.

James Lucas

94,697 views • 3 months ago

The founder of #Cardano $ADA Charles Hoskinson on #BitcoinDeFi "when our team started, a proof on Bitcoin was 40GB, now 28.1MB. It used to take 354s to validate a Bitcoin DeFi proof, now 0.149s. It used to cost $14,000 to validate that transaction, now $37." 👇 What used to take 40 GB of data, 6 minutes, and cost over $14,000 to process now takes under 30 MB, less than a second, and costs about $37 — and they already proved it works on Bitcoin’s main network. In plain English: Bitcoin holders will soon be able to put their BTC to work (earn yield, lend, etc.) on #Cardano without handing it over to a middleman or wrapped-token service. The Bitcoin stays locked safely on the Bitcoin network itself. This is one of the clearest signs yet that real, usable #Bitcoin #DeFi is getting closer. This isn't possible elsewhere. Bullish for $ADA. 🔥

The founder of #Cardano $ADA Charles Hoskinson on #BitcoinDeFi "when our team started, a proof on Bitcoin was 40GB, now 28.1MB. It used to take 354s to validate a Bitcoin DeFi proof, now 0.149s. It used to cost $14,000 to validate that transaction, now $37." 👇 What used to take 40 GB of data, 6 minutes, and cost over $14,000 to process now takes under 30 MB, less than a second, and costs about $37 — and they already proved it works on Bitcoin’s main network. In plain English: Bitcoin holders will soon be able to put their BTC to work (earn yield, lend, etc.) on #Cardano without handing it over to a middleman or wrapped-token service. The Bitcoin stays locked safely on the Bitcoin network itself. This is one of the clearest signs yet that real, usable #Bitcoin #DeFi is getting closer. This isn't possible elsewhere. Bullish for $ADA. 🔥

🪏Ed n'Stuff

38,518 views • 1 month ago

Jensen Huang at GTC: "I expect data center build out to reach a trillion dollars, and I am fairly certain we're going to reach that very soon." "General purpose computing has run its course, and that we need a new computing approach." "In the past we wrote the software and we ran it on computers. In the future, the computer is going to generate the tokens for the software." "The computer has become a generator of tokens, not a retrieval of files."

Jensen Huang at GTC: "I expect data center build out to reach a trillion dollars, and I am fairly certain we're going to reach that very soon." "General purpose computing has run its course, and that we need a new computing approach." "In the past we wrote the software and we ran it on computers. In the future, the computer is going to generate the tokens for the software." "The computer has become a generator of tokens, not a retrieval of files."

vitrupo

56,013 views • 1 year ago