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Watch trailer on Steam ↗Prime Prism
Totori Works · Published by Totori Works
16 achievements
Last updated 28 Sept 2026
"Prime Prism" is a pure logic puzzle game themed around prime numbers and factorization. Construct circuits of light using optical tools like "Prisms" and "Lenses" to decompose and synthesize numbers. Over 140 stages across 11 worlds await your challenge.
£11.75
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Price history
Indie · 2026 · More £5 - £15 games
About this game
"Prime Prism" is a mathematical puzzle game designed to allow you to face "numbers" and "logic" in their purest forms.
You must utilize limited space and tools to convert numerical values emitted from an Emitter (light source) into the target values required by a Receiver. In this game, numbers are not merely objects of calculation, but are expressed as "light"—split by prisms and converged by lenses.
Key Features:
Visualize Prime Factors: No mental arithmetic speed is required. The prime factors of each number are constantly visualized within the game. For example, "504" is displayed as its components "2³×3²×7". Even massive numbers can be manipulated freely with the power of logic once their structure is understood.
Various Optical Tools: New tools with unique properties are unlocked as you progress through each world.
Prism: The most fundamental and important tool that extracts the smallest prime factor from a value.
Lens: Bundles light beams to multiply their values.
Resonator: Extracts the greatest common divisor (GCD) from multiple beams of light.
There are many other tools available. Combine them to discover number conversion routes that might seem impossible at first glance.
This game has over 140 stages where you can experience the properties of prime numbers and prime factors. You will need to understand the relationship between tools, prime numbers, and prime factors and find ways to create circuits efficiently.
Streaming and Video Policy
You are welcome to stream, record, upload, and monetize videos of Prime Prism, regardless of whether you are an individual or a company.
It is not required, but I would appreciate it if you include a link to the Steam store page in your video description or stream description.
System Requirements
Will my PC run this? →Minimum
- OS: Microsoft Windows 10 Home
- Processor: Intel Core i3, N100 / AMD Ryzen 3
- Memory: 4 GB RAM
- Graphics: Intel HD Graphics 4000
Supported Languages
Latest news
Patch NotesOfficial
Improved World Unlocks and Stage Information
This mini-update improves several UI elements and makes progression and stage information easier to understand.ChangesImproved the notification shown when a new world is unlockedIncreased the displayed difficulty ratings of World 1 stages 10, 11, and 12This only changes their difficulty ratings. The puzzles themselves and their solutions have not been changedImproved the stage-clear UIRevised the titles of several stagesAdded Japanese localization for all stage titlesThe following bugs have been fixed:Prisms initially placed on the board were not rendered correctly.Hints were missing in World 10-11 and 10-12.We will continue reviewing player activity and making adjustments to the presentation and usability of the game.Read full article on Community Announcements (Totori)AnnouncementsOfficial
Prime Prism Is Available Now
Prime Prism is now available on Steam.Prime Prism is a mathematical puzzle game built around numbers, logic, and prime factorization. Using a limited board and a set of optical tools, your goal is to transform the values emitted by an Emitter into the target values required by a Receiver.The prime factors of every number are visualized in the game, so fast mental arithmetic is not required. Instead, you will need to read the structure of each number and combine tools such as the Prism, Lens, and Resonator to construct a valid transformation route.The full game includes more than 140 stages. New tools and mechanics are introduced as you progress through each world, leading to puzzles involving set differences, greatest common divisors, the removal of duplicate prime factors, and more.Later stages are not simply about placing more tools. They ask you to observe the board carefully and find a solution within the limited space available.Thank you to everyone who played the demo and added Prime Prism to their wishlist.Play data and feedback from Steam Next Fest helped guide the final adjustments to the switch and gate mechanics, stage difficulty, and the structure of the more challenging puzzles.Prime Prism is ready to play now on Steam.Read full article on Community Announcements (Totori)AnnouncementsOfficial
Prime Prism launches on July 21
The release date for Prime Prism has been set for July 21, 2026.Prime Prism is a puzzle game about prime factors, numbers, and logic. Using a limited space and a set of tools, your goal is to transform the number emitted by an Emitter into the target number required by the Receiver.The full version is currently planned to include 144 levels. As you progress through each world, new tools are introduced, allowing you to take on increasingly complex number transformations using concepts such as set difference, greatest common divisors, and removing duplicate prime factors.After releasing the demo during Steam Next Fest, I have been making final adjustments for the full version based on play data and player feedback. The current focus includes adding switch and gate mechanics, adjusting the difficulty of individual levels, and improving the overall quality of each puzzle. In particular, for the more difficult levels, I am working to make sure they are not simply about using more tools, but can be solved through careful observation and insight.Thank you to everyone who played the demo and wishlisted the game.The launch is getting close. I will continue making the final adjustments toward release.Read full article on Community Announcements (Totori)Patch NotesOfficial
[Update] Usability and Difficulty Adjustments
We have released a minor update today.Tool AdjustmentsRemoved the input direction requirement for the Exciter and Attenuator. This eliminates the need for rotation, improving overall usability.Stage Adjustments and ChangesIncreased the puzzle difficulty and adjusted the order of several stages. Due to this reordering, World 4 Stage 5 has been replaced with a new stage.Read full article on Community Announcements (Totori)Patch NotesOfficial
Demo Update: Added 4 new stages
I've just updated the demo with 4 additional stages in World 1 and World 2.The two new levels in World 2, in particular, are designed to be a bit of a challenge for the early game. If you are looking for a quick logic test, give them a try.Read full article on Community Announcements (Totori)
