Gapcoin Explained: Prime Gaps and Trading GAP for Bitcoin
Published 2026-11-10 UTC
Gapcoin’s proof of work searches prime gaps, not Primecoin’s prime chains. What to check before buying, selling or withdrawing GAP on AltQuick.
Gapcoin logo from the official project.
Public information checked November 9, 2026, America/Chicago. This guide explains Gapcoin’s prime-gap proof of work and what to check before buying, selling or withdrawing GAP; it does not document a completed transfer or a mining test.
Gapcoin (GAP) connects cryptocurrency mining with a particular mathematical search: gaps between consecutive prime numbers. That makes its story different from a coin whose mining work only searches for an acceptable hash. It also makes GAP different from Primecoin, despite the similar subject matter.
Understanding that work is one question. Buying or selling the resulting coin is another. Here is how to separate the mathematics, mining and market decisions before using the Gapcoin market on AltQuick.
What is a prime gap?
A prime number is a whole number greater than one divisible only by itself and one. A prime gap is the difference between successive primes. For example, 7 and 11 are consecutive primes, so the gap is 4.
The average gap near a prime tends to grow as that prime gets larger, so a raw gap length does not tell the whole story. Gapcoin’s mathematical explanation describes merit, a score that compares a gap with the logarithm of the lower prime. This lets the search assess the size of a gap relative to where it occurs.
Gapcoin’s proof of work searches for prime gaps and scores them by merit. This is computational number-theory work. It does not mean every block establishes a world record, proves a new theorem, or produces a commercial application.
Gapcoin is not Primecoin
Both projects involve primes, but their searches are different. Gapcoin searches for gaps between consecutive primes. Primecoin describes its proof of work as searching for prime chains, including Cunningham chains and bi-twin chains.
GAP and Primecoin’s XPM are separate assets. A shared mathematical theme does not make their wallets, addresses or deposits interchangeable. When acquiring or moving GAP, select Gapcoin throughout the process rather than choosing an asset because its name sounds related.
Do you need to mine to own GAP?
No. Mining, holding and trading are separate activities. You can acquire GAP from someone selling it without operating mining software, just as a miner can retain coins without immediately selling them.
If your goal is learning about the mathematics, start with the project explanation. If your goal is mining, investigate the software and network requirements separately. The project’s downloads and mining documentation contain older material, including releases from 2021. Example pool addresses are not evidence of a currently operating pool. Check compatibility and current participation options before installing software or committing computing resources.
An older page’s record claim also needs its date attached. A gap described as a record in an earlier project article is not automatically the largest known today.
Buying or selling GAP on AltQuick’s order book
AltQuick has a Gapcoin asset page and a GAP/Bitcoin market. Before moving funds, check the current system status and FAQ. Trading availability does not by itself establish that deposits or withdrawals are available; check each action you need.
On the account market, buying GAP spends Bitcoin, while selling GAP receives Bitcoin. Bids represent buyers and asks represent sellers. The last traded price is historical: it does not guarantee the price or quantity available for your next order.
For a purchase, deposit Bitcoin using the Bitcoin deposit details in your account. For a sale, deposit GAP using the Gapcoin deposit details. Wait for the account to show the credited balance before placing the corresponding trade. Review current deposit requirements and minimums first, rather than assuming a very small transfer will be credited. This post does not state fee amounts or confirmation counts; use the figures shown in the FAQ and on the form at the time you transact.
A limit order sets a maximum purchase price or a minimum sale price. It can fill immediately if marketable at that limit or better; any unmatched remainder may rest on the book. A limit that cannot match available orders may not fill. A market order instead uses available opposite-side orders, so its execution price can differ from the last trade, particularly when little quantity is offered near that price.
Choose the order type for your goal. If a price boundary matters, a limit provides that boundary, but not a promise of execution. Neither order type creates liquidity that is absent from the book.
Withdrawing GAP, and checking Swap separately
To hold GAP in your own wallet, use the withdrawal page and select Gapcoin. Obtain the receiving address from a Gapcoin wallet, compare the entire address and confirm that AltQuick accepts its format. A valid project address format does not establish support for every format in an exchange form.
Review the current fee and minimum before submitting. This post does not state those amounts. The FAQ, asked whether AltQuick can help after a withdrawal to the wrong address, answers: “No. Please use extreme care when withdrawing.” A small test can help check your destination before a larger transfer, but it still needs to meet the applicable minimums and fees.
Do not assume that a listed order-book market is also available through account-free Swap. At successful public checks at 9:06 PM and 9:32 PM America/Chicago on November 9, 2026, the GAP/Bitcoin Swap pairs BTC-GAP and GAP-BTC were closed. Recheck the live Swap page before relying on that route. Unless that recheck shows the GAP/Bitcoin pairs open, use the account order book described above, not Swap.
Common questions
Does buying GAP contribute computing power to prime-gap searches? No. Buying changes who owns coins. Running compatible mining software is a separate activity that performs computational work.
Is Gapcoin the same as Primecoin? No. Gapcoin searches prime gaps; Primecoin searches prime chains. They use separate assets and software.
Does useful proof of work guarantee that GAP will gain value? No. Mathematical work does not guarantee market demand, liquidity or a future price. Decide whether you want to study the project, participate computationally or trade the asset; those goals have different requirements.
Can I use AltQuick Swap to exchange GAP and Bitcoin without an account? Only if the live Swap page shows the GAP/Bitcoin pair you want as available. When this article’s sources were last read successfully, those pairs were closed. If you need a price boundary, use a limit on the account book.