While cryptocurrency prices were under heavy pressure during the first five months of 2018, the processing power behind SHA-256 blockchain networks continued to expand at an extraordinary pace. The article argues that, regardless of the market downturn, the mining infrastructure supporting Bitcoin and related SHA-256 assets had already become one of the largest computational systems ever assembled in the internet era.
Rather than focusing only on token valuations or electricity consumption, the report highlights a less discussed dimension of the crypto economy: raw computing power. Since the launch of Bitcoin in 2009, and with the continued development of other SHA-256-based networks, the ecosystem has pushed distributed computation into what the article describes as the “exahash era.”
How Hashrate Became the Core Metric
In proof-of-work systems using the SHA-256 algorithm, mining machines perform vast numbers of hash calculations in an attempt to solve the mathematical puzzle required to produce a valid block. This processing speed is referred to as hashrate. The greater the hashrate controlled by a miner or pool, the better the odds of finding the next block and collecting the associated reward.
That reward structure, according to the article, has helped create one of the most powerful computational environments in existence. Mining profitability and competition have driven hardware investment, pool formation, and ongoing specialization in ASIC design. As a result, decentralized blockchains have accumulated processing capacity on a scale once associated only with major state-backed or corporate-backed supercomputing projects.
Bitcoin Reached Exascale-Class Performance Earlier Than Expected
The article connects crypto mining to the broader concept of exascale computing, commonly defined as a system capable of processing more than one exaflop per second, or a billion billion calculations every second. It notes that in May 2013, the Bitcoin network surpassed 1 exaflop, a level that at the time was said to be six to eight times faster than the combined speed of the world’s top 500 supercomputers.
By the time of the report, Bitcoin’s network hashrate was cited at roughly 30 to 35 exahash per second, or more than 30 billion gigahashes per second. Bitcoin Cash, another SHA-256 network, was estimated at about 3 to 5 exahash per second. These figures illustrate how quickly mining power had expanded even as digital asset prices were declining.
The historical comparison is especially striking. When IBM’s Roadrunner supercomputer broke the petaflop barrier in 2009, computer scientists broadly estimated that true exascale computing would not be realized until around 2018. Yet the article notes that Bitcoin exceeded 1 exahash in 2016 and Bitcoin Cash passed 1 exahash in late 2017, effectively pushing decentralized crypto networks into that territory earlier than many traditional forecasts had anticipated.
A Global Computing Network Without Government or Corporate Sponsorship
One of the central arguments in the piece is that this achievement is remarkable not only because of the scale involved, but because of how it was built. Unlike conventional supercomputing programs, SHA-256 mining networks were not assembled through central planning, government contracts, or a single enterprise budget. Instead, they emerged from the incentive structure of Nakamoto Consensus, with miners voluntarily contributing computation in exchange for block rewards and transaction fees.
The article describes this as a major feat of computer engineering. ASIC manufacturers seeking performance gains, and miners pursuing profitability, together pushed these networks to record-setting levels of computational throughput. In that sense, the report frames mining as more than an economic activity: it is also a decentralized engineering achievement driven by competition and protocol-level incentives.
It also states that Bitcoin and Bitcoin Cash together accounted for more than two-thirds of all hashrate among SHA-256 coins at the time. That concentration underscores the dominance of the two major networks within the broader SHA-256 ecosystem, while also showing where most of the industry’s hardware investment and operational scale had been directed.
Why the Exahash Era Matters
The term “exahash era” is significant because it signals a threshold in distributed processing power. In practice, it means blockchains secured by proof-of-work are no longer niche experiments running on hobbyist hardware. They have evolved into industrial-scale systems with enormous computational depth, substantial hardware specialization, and global participation.
The article suggests this progress is particularly meaningful given the broader market environment. Even with prices falling for months, participants continued to add mining capacity. That behavior implies that many miners and infrastructure operators retained confidence in the long-term relevance of SHA-256 networks, choosing to deploy capital despite short-term weakness in the market.
From a network security perspective, rising hashrate is often associated with increased resistance to attacks, since any hostile actor would need to marshal an even greater amount of computational power to challenge the chain. Although the article does not dwell on security analysis in detail, the underlying implication is clear: larger hashrate reflects both greater industrial commitment and a stronger protective wall around these networks.
Could the Next Stage Be the Zetahash Era?
Looking ahead, the piece speculates that if SHA-256 networks eventually surpass 500 exahash, they could enter what it calls the “zetahash era.” It also points to expected hardware upgrades, including the deployment of 10 nanometer and 7 nanometer chips in newer mining rigs later that year, as a possible driver of further growth.
That observation reflects a familiar dynamic in the mining sector: improvements in chip efficiency and performance tend to expand overall network power, especially when operators reinvest into new equipment. More advanced fabrication processes can allow more hashes per watt or more total output per unit of hardware, which in turn can reshape the economics of mining and raise the aggregate computational ceiling of the network.
Market Weakness Did Not Stop the Infrastructure Buildout
A notable takeaway from the article is the divergence between price action and infrastructure growth. The first five months of 2018 were described as highly bearish in valuation terms, yet miners continued to expand network power. This disconnect suggests that hashrate trends can reflect a different layer of conviction than spot market sentiment alone.
For the author, the continued rise in SHA-256 processing power is evidence that a significant number of participants believed in the long-term importance of the technology. Month after month, they kept adding capacity and breaking computational records, even when the asset market itself offered little immediate encouragement.
In that respect, the article presents mining as both an industrial contest and a statement of confidence. It argues that whether one admires miners or criticizes them, their role in extending the limits of decentralized computation cannot be ignored. Through voluntary participation and profit incentives, they helped transform Bitcoin and related networks into systems operating at a scale once reserved for the most advanced computing programs in the world.
Ultimately, the report positions SHA-256 mining as a milestone in the history of computing. It is not merely that Bitcoin and Bitcoin Cash achieved large hashrates, but that they did so through a permissionless, incentive-driven structure with no central operator. In the article’s view, that combination of scale, decentralization, and sustained growth marks a significant technological achievement—one that continued to advance even in the face of a difficult market cycle.