Litecoin network security: hashrate, mining pools, and 51% attack costs

3.34 PH/s: the most secure Litecoin has ever been

In early 2026, Litecoin's hashrate hit an all-time high of 3.34 petahashes per second. That number means miners collectively perform 3.34 quadrillion Scrypt hash calculations every second to secure the network. More hashrate means more energy spent, more hardware deployed, and a higher cost to attack. Litecoin has never been more expensive to compromise than it is right now.

But hashrate alone does not tell the full security story. Litecoin's security model depends on three interlocking factors: mining hardware economics, merged mining with Dogecoin, and the difficulty adjustment algorithm. Understanding all three is essential before you trust the network with significant value.

How Litecoin mining works

Litecoin uses the Scrypt proof-of-work algorithm. Miners compete to find a hash that meets the current difficulty target. The first miner to find a valid hash creates the next block, earns the block reward (currently 6.25 LTC), and collects transaction fees. A new block is produced every 2.5 minutes on average.

Merged mining with Dogecoin: the unsung security alliance

Since 2014, Litecoin and Dogecoin share the Scrypt mining algorithm and support auxiliary proof-of-work (AuxPoW). This means miners can mine both chains simultaneously using the same hardware and energy. They submit Litecoin blocks as normal and include a Dogecoin block header as auxiliary data — earning rewards from both chains for the same work.

This is critical for Litecoin's security:

• Double the economic incentive: miners earn LTC + DOGE for the same electricity cost. This makes mining more profitable, which attracts more hashrate, which makes the network more secure. At current prices, DOGE block rewards add roughly 30-40% to a miner's total revenue on top of LTC rewards
• Shared security pool: an attacker wanting to 51% attack Litecoin must outcompete miners who are earning from both LTC and DOGE. The attack cost is effectively the combined security budget of both chains
• Resilience to LTC price drops: if LTC price falls, miners might leave if they were only earning LTC. But DOGE revenue provides a floor — miners stay because the combined income remains profitable even when one chain's price drops

The 51% attack: how much would it cost?

A 51% attack means an attacker controls more than half of the network's hashrate, allowing them to double-spend transactions by creating a longer chain that overwrites the legitimate one.

Estimated cost to 51% attack Litecoin for one hour (as of March 2026):

• Hardware: to match 3.34 PH/s, an attacker needs roughly 5,500 Bitmain Antminer L7 units (each ~620 MH/s). At $4,000 per unit, that is $22 million in hardware — assuming you can buy them, which is unlikely at that volume
• NiceHash rental: renting Scrypt hashrate is the more realistic attack vector. At current NiceHash rates, renting enough Scrypt hashrate for a 51% attack costs approximately $50,000-100,000 per hour. This is significant but not prohibitive for a well-funded attacker
• Opportunity cost: using that hashrate to attack destroys the attacker's ability to earn legitimate mining rewards. For a sustained attack, the opportunity cost adds up quickly

Mining pool distribution

Decentralization means no single pool controls enough hashrate to censor transactions or perform selfish mining. Current major Litecoin pools:

• Litecoinpool.org: one of the oldest pools, consistently among the top 3
• ViaBTC: large multi-coin pool with significant LTC hashrate
• F2Pool: major Chinese pool, one of the largest globally
• Antpool: Bitmain-operated pool
• Poolin: large multi-algorithm pool

No single pool consistently exceeds 30% of total hashrate, which is a reasonable level of decentralization. If any pool approached 51%, the community response would be swift — as happened with Bitcoin's GHash.io pool in 2014, which voluntarily reduced its hashrate after approaching the 51% threshold. Monitor current pool distribution on our mining dashboard.

The halving security question

The 2027 halving cuts the block reward from 6.25 to 3.125 LTC. This halves miners' revenue (in LTC terms). If the LTC price does not double to compensate, some miners will become unprofitable and shut down, reducing hashrate and — temporarily — reducing security.

This is not theoretical. After every previous halving, hashrate dipped before difficulty adjusted downward to make mining profitable again at the lower reward. The self-correcting mechanism works, but there is a vulnerability window of 1-2 weeks where hashrate drops faster than difficulty adjusts.

Merged mining with DOGE provides a buffer: even if LTC mining alone becomes unprofitable, the combined LTC+DOGE revenue may keep miners running through the adjustment period. This is the primary reason merged mining is so valuable — it smooths the post-halving security transition.

Luxxfolio: institutional mining arrives

Luxxfolio Holdings became the first publicly traded company running active Litecoin mining operations in 2025. The company holds over 20,000 LTC from mining proceeds. Institutional miners bring three things that individual miners do not: consistent hashrate (they do not turn off during price dips), professional facility management (lower per-hash costs), and public accountability (quarterly reporting of hashrate and holdings).

Whether institutional mining centralizes or decentralizes the network depends on scale. One institutional miner alongside thousands of independent miners adds stability. If institutional miners eventually dominate, the centralization concerns that plague Bitcoin mining (where a handful of companies control the majority of hashrate) could apply to Litecoin as well.

Frequently asked questions

Has Litecoin ever been 51% attacked?

No. In over 14 years of operation, Litecoin has never suffered a successful 51% attack. The combination of high hashrate, Scrypt ASICs, and merged mining with Dogecoin makes the attack cost prohibitively expensive.

What is merged mining?

Merged mining allows miners to mine Litecoin and Dogecoin simultaneously using the same hardware. Both chains use the Scrypt algorithm and support auxiliary proof-of-work. Miners earn rewards from both chains for the same energy expenditure, effectively doubling the economic incentive to secure the Litecoin network.

What happens to security after the 2027 halving?

The block reward drops from 6.25 to 3.125 LTC, reducing mining revenue. Some miners may shut down temporarily until difficulty adjusts. Merged mining with DOGE provides a revenue buffer. Historically, hashrate dips post-halving but recovers within weeks as difficulty rebalances.

Sources

• Litecoin blockchain — hashrate and difficulty data
• BitInfoCharts — mining pool distribution and hashrate history
• Crypto51.app — estimated 51% attack cost calculations
• Luxxfolio Holdings — public filings and mining operations reports