### By Kazragor - 10.03.2020

## Mining bitcoin with pencil and paper

I decided to see how practical it would be to mine Bitcoin with pencil and paper. It turns out that the SHA algorithm used for mining is pretty. Over the past few years, Bitcoin has gone from something you mined with spare CPU cycles, to something you could hash with a GPU, to an.

Advertisement In contrast, Litecoin, Dogecoin, and similar altcoins use the scrypt hash algorithm, which is intentionally designed to be difficult to implement in hardware. It stores different hash https://catalog-id.ru/and/bitcoin-and-ethereum.html into memory, and then combines them in unpredictable ways to get the mining bitcoin with pencil and paper result.

As a result, much more circuitry and memory is required for scrypt than for SHA hashes. You can see the impact by looking at mining hardwarewhich is thousands of times slower for scrypt Litecoin, https://catalog-id.ru/and/pixel-gun-3d-unlimited-coins-and-gems-apk-download.html than for SHA Bitcoin.

Mining Bitcoin with ExcelConclusion The SHA algorithm is surprisingly simple, easy enough to do by hand. The elliptic curve algorithm for signing Bitcoin transactions would be very painful to do by hand since it has lots of multiplication of byte integers.

## Mining Bitcoin with Pencil and Paper

Doing one round of SHA by hand took me 16 minutes, 45 seconds. At this rate, hashing a full Bitcoin block rounds [3] would take 1.

In comparison, current Bitcoin mining hardware does several terahashes per second, about mining bitcoin with pencil and paper quintillion times faster than my manual hashing. Needless to say, manual Bitcoin mining is not at all practical.

The next question is the energy cost. Thus my energy cost per hash is about 67 quadrillion times that of mining hardware. It's clear I'm not going to make my fortune off manual mining, https://catalog-id.ru/and/8-ball-pool-unlimited-coins-and-cash-apk.html I haven't even included the cost of mining bitcoin with pencil and paper the paper and pencils I'll need.

Footnotes [1] It's not exactly the number of zeros at the start of the hash that matters.

To mining bitcoin with pencil and paper precise, the hash must be less than a particular value that depends on the current Bitcoin. Advertisement [2] The source of the constants used in SHA is interesting. The NSA designed the SHA algorithm and picked the values for these constants, so how do you know they didn't pick special values here let them break the hash?

To avoid suspicion, the initial hash values come from the square click of the first 8 primes, and mining bitcoin with pencil and paper Kt values come from the cube roots of the first 64 primes.

Since these constants come from a simple formula, you can trust that the NSA didn't do anything shady at least with the constants.

Thus, a more info set of 64 SHA hash rounds is required on the second half of the Bitcoin block. Adding this up, hashing an arbitrary Bitcoin block takes rounds in total. However there is a shortcut.

Mining involves hashing the same block over and here, just changing the nonce which appears in the second half of the block.

Thus, mining can reuse https://catalog-id.ru/and/bitcoin-and-crypto-trading-ltd.html result of hashing the first bits, and hashing a Bitcoin block typically only requires rounds.

Advertisement [4] Obviously I didn't just have incredible good fortune to end up with a successful hash.

I started the hashing process with a block that had already been successfully mined.

## Learn how to mine Bitcoin with just a pencil and paper

In particular I used the one displayed earlier in this article, [5] Another mining bitcoin with pencil and paper with manual mining is new blocks are mined about every 10 minutes, so even if Continue reading did succeed in mining a block, it would be mining bitcoin with pencil and paper obsolete orphaned by the time I finished.

Advertisement This post first appeared on Ken Shirriff's blog and is republished here with permission. Advertisement Ken Shirriff is a software engineer who blogs about chargers, old integrated circuits, and Bitcoin in his spare time.

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