Crypto 101 · Research papers
Litecoin Tokenomics: 84 Million Coins and Scrypt Mining
Abstract
Litecoin keeps Bitcoin's disinflationary shape but changes three parameters: blocks arrive four times as often, the halving interval is four times as many blocks, and the total supply is therefore four times larger. It also replaces SHA-256 with Scrypt, a memory-hard function, as its proof of work. We tabulate the issuance schedule, explain merged mining with Dogecoin and summarise the optional MWEB privacy extension.
Keywords: Litecoin, Scrypt, 84 million, halving, merged mining, MWEB
1. Parameters
Litecoin launched in October 2011 as a lighter variation of Bitcoin. Its creator stated that it would produce roughly four times as many coins as Bitcoin, about 84 million, that the average block takes 2.5 minutes rather than ten, and that Scrypt was chosen as the proof of work [1]. The consensus parameters in the source code agree: a halving interval of 840,000 blocks, a 2.5-minute target spacing and a difficulty window of 3.5 days [2].
Because blocks are four times as frequent and the halving interval four times as long, Litecoin halves on roughly the same four-year calendar as Bitcoin while issuing four times the number of coins.
2. Issuance schedule
Table 1. Litecoin issuance by epoch (approximate calendar years).
| Epoch | Approx. years | Subsidy (LTC) | Issued in epoch | Cumulative |
|---|---|---|---|---|
| 1 | 2011-2015 | 50 | 42,000,000 | 42,000,000 |
| 2 | 2015-2019 | 25 | 21,000,000 | 63,000,000 |
| 3 | 2019-2023 | 12.5 | 10,500,000 | 73,500,000 |
| 4 | 2023-2027 | 6.25 | 5,250,000 | 78,750,000 |
| 5 | 2027-2031 | 3.125 | 2,625,000 | 81,375,000 |
The series converges toward 84 million in the same way as Bitcoin's toward 21 million. The subsidy in each epoch follows directly from the halving interval in the source [2].
3. Why Scrypt
Scrypt was introduced by Percival as a key-derivation function that is deliberately expensive in memory as well as in computation [3], and is standardised as RFC 7914 [4]. Litecoin's announcement cited the wish to mine Litecoin without competing directly with Bitcoin's miners [1]. In practice Scrypt mining later moved to dedicated hardware, but the algorithm remains distinct from SHA-256, which keeps the two mining economies separate.
4. Merged mining
Merged mining, also called auxiliary proof of work, lets a miner solve one proof of work that is valid for more than one chain [5]. Dogecoin, which also uses Scrypt, activated auxiliary proof of work from block 371,337 [6], which allows Litecoin miners to secure Dogecoin at little additional cost. This is a concrete example of proof-of-work security being shared across assets with different supply schedules.
5. MWEB
Litecoin's improvement proposals describe MimbleWimble Extension Blocks (MWEB), an optional extension that adds confidential transactions alongside the ordinary chain [7]. It does not change the 84 million supply; it changes how some balances are held and transferred.
6. A supply-and-demand reading
Compared with Bitcoin, Litecoin offers the same shape of supply with a larger unit count and faster blocks. Its demand comes from payments, Scrypt mining and its role as a long-running proof-of-work asset. Larger unit counts do not change scarcity by themselves; they change the size of the smallest and the largest amounts people transact in.
References
- Lee, C. (coblee) (2011). [ANN] Litecoin - a lite version of Bitcoin. Launched!. Announcement thread, Bitcointalk, 9 October 2011. https://bitcointalk.org/index.php?topic=47417.0
- Litecoin Project (2011). chainparams.cpp. Litecoin Core source code: main-net consensus parameters (halving interval 840,000; 2.5-minute target spacing). https://github.com/litecoin-project/litecoin/blob/master/src/chainparams.cpp
- Percival, C. (2009). Stronger Key Derivation via Sequential Memory-Hard Functions. BSDCan 2009; the paper that introduced scrypt. https://www.tarsnap.com/scrypt/scrypt.pdf
- Percival, C., & Josefsson, S. (2016). RFC 7914: The scrypt Password-Based Key Derivation Function. IETF RFC. https://www.rfc-editor.org/rfc/rfc7914
- Bitcoin Wiki contributors (2011). Merged mining specification. Bitcoin Wiki: how one proof of work can secure more than one chain (auxiliary proof of work). https://en.bitcoin.it/wiki/Merged_mining_specification
- Dogecoin Core developers (2013). chainparams.cpp. Dogecoin Core source code: 60-second target spacing; AuxPoW (merged mining) effective from block 371,337. https://github.com/dogecoin/dogecoin/blob/master/src/chainparams.cpp
- Litecoin Project (2021). Litecoin Improvement Proposals (LIPs). Repository of Litecoin improvement proposals, including the MimbleWimble Extension Blocks (MWEB) specifications. https://github.com/litecoin-project/lips
Common questions
How many litecoin will ever exist?
About 84 million. The announcement of Litecoin states roughly four times as many coins as Bitcoin, which follows from halving every 840,000 blocks instead of every 210,000.
Is Litecoin mined with the same hardware as Bitcoin?
No. Litecoin uses Scrypt, not SHA-256, so it is mined with Scrypt hardware. The same Scrypt hardware can also mine Dogecoin, and the two can be merge-mined.
General education, not financial, tax or legal advice. Figures are schematic. Protocol parameters are cited to primary sources and can change; verify against the linked source before relying on them.