expected (even compared to my 12 minute Mandelbrot ). But even a computer that predates integrated circuits can implement the Bitcoin mining algorithm. On the other hand, today you can spend 50 and get a USB stick miner with a custom asic integrated circuit. He verified that he was able to find a successful hash by comparing it against one that had already been mined. A basic IBM 1401 system sold for 125,600, which is about a million dollars in 2015 dollars. Mining Bitcoin on a 55 year old IBM mainframe works worse than expected. Even though it doesn't really make any sense to try and attempt mining on such old hardware, this little experiment is kind of fun an interesting in my opinion. I ran into an interesting blog post today where a guy named Ken Shirriff decided to test what would happen if you mined Bitcoin on a 55 year old IBM 1401 mainframe! It requires about 3000 Watts of power, roughly the same as an oven or clothes dryer. The electricity would cost about 1018 dollars.
The enormous difference in performance is due to several factors: the huge increase in computer speed in the last 50 years demonstrated by Moore's law, the performance lost by using a decimal business computer for a binary-based hash, and the giant speed gain from custom. To summarize, to mine a block at current difficulty, the IBM 1401 would take about 5x1014 years (about 40,000 times the current age of the universe). What do you think? This USB miner performs.6 billion hashes per second and uses about 4 watts. You would be wrong. The decimal arithmetic of a business computer is a very poor match for a binary-optimized algorithm like SHA-256.
Mining, bitcoin on a 55 year old IBM mainframe works worse
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Let us know in the comments! Ken went on to say that he didn't actually mine real Bitcoin using accelerator oscilador forex this museum computer, but he did actually create and run the SHA-256 algorithm on the IBM 1401, showing that mining is possible in theory. If you think he was able to really crank out hashes on that old giant monstrosity using punch cards and assembly language, well. Newer Post, older Post, home. Obviously, mining Bitcoin on an IBM 1401 mainframe is not a profitable venture.Implementing SHA-256 in assembly language for an obsolete mainframe was a challenging but interesting project. Via m : The IBM 1401 can compute a double SHA-256 hash in 80 seconds. And you'd get 25 bitcoins worth about 6000.
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