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modpack

SL Quantum FactoryMinecraft modpack for 1.21.1

SL: Quantum Factory: a tech modpack for modern engineering without the lag. Focused on extreme optimization, it lets you build colossal factories and quantum systems with peak performance. Experience complexity with fluidity.

newest supported 1.21.1MultiplayerSmall LightTech
Latest version
SL Quantum Factory(beta)-1.6.3-b3.zip
Minecraft
1.21.1
Java
Java 21+
Loader
NeoForge
Licence
not stated
Downloads
1.5k
Updated
2 mo ago
Available on
CurseForge
Space NodeOur hosting

Host SL Quantum Factory servers

One click and SL Quantum Factory is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version SL Quantum Factory declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge21+declared8 Aug 2024

Download

From SL Quantum Factory’s own host. Nothing is re-hosted here.

SL Quantum Factory(beta)-1.6.3-b3.ziprelease17 Jun 2026

SL Quantum Factory(beta)-1.6.3-b3.zip · 6.0 MB · for 1.21.1

Download latest
98c967536034…
Older versions22
  • SL Quantum Factory(beta)-v1.6.3-b2.zip28 May 20261.21.16.1 MB5a2674de893d…Get
  • SL Quantum Factory-v1.6.2-h1.zip24 May 20261.21.123.5 MB91 downloads4e2f5b964342…Get
  • SL Quantum Factory(Beta)-v1.6.3-b1.zip18 May 20261.21.16.1 MB51 downloads1eded98e9893…Get
  • SL Quantum Factory-v1.6.2.zip16 May 20261.21.123.5 MB60 downloads915eb02da0ce…Get
  • SL Quantum Factory(Beta 2)-v1.6.2-b2.zip12 May 20261.21.123.5 MB8d5953f56e8e…Get
  • SL Quantum Factory(beta)-v1.6.2.zip12 May 20261.21.123.5 MB10 downloadsd7994022682a…Get
  • SL Quantum Factory-v1.6-1 (Hotfix)22 Mar 20261.21.118.4 MB195 downloads5f101a11a907…Get
  • SL Quantum Factory-v1.620 Mar 20261.21.118.4 MB19 downloads790da803898e…Get
  • SL Quantum Factory-v1.5.6.zip27 Feb 20261.21.118.1 MB87 downloads589d65612d00…Get
  • SL Quantum Factory-v1.5.5-F.zip23 Feb 20261.21.117.1 MB32 downloads5a58ccea3cdd…Get
  • SL Quantum Factory-v1.5.5.zip21 Feb 20261.21.10.6 MB26 downloads2e695d0d2d10…Get
  • SL Quantum Factory-v1.5.421 Feb 20261.21.117.1 MB27 downloads00732e358f17…Get
  • SL Quantum Factory-v1.5.310 Feb 20261.21.19.6 MB85 downloadsaac01b77d2e6…Get
  • SL Quantum Factory-v1.5.29 Feb 20261.21.19.6 MB13 downloads9ac64ad9e994…Get
  • SL Quantum Factory-v1.5.12 Feb 20261.21.13.5 MB79 downloadsc8f4a02aa941…Get
  • SL Quantum Factory-v1.5.028 Jan 20261.21.13.5 MB44 downloads5199e74ea271…Get
  • SL Quantum Factory-v1.4.026 Jan 20261.21.10.6 MB21 downloadsa7b9f2d40944…Get
  • SL Quantum Factory-v1.3.022 Jan 20261.21.10.6 MB17 downloads6e1c2723aee5…Get
  • SL Quantum Factory-v1.2.022 Jan 20261.21.10.6 MB31 downloadsf21d126df79f…Get
  • SL Quantum Factory-v1.1.020 Jan 20261.21.10.5 MB31 downloads0fe1fedff021…Get
  • SL Quantum Factory-v1.0.119 Jan 20261.21.10.5 MB25 downloadsb208cdf05ea6…Get
  • SL Quantum Factory-v1.0.019 Jan 20261.21.10.5 MB7 downloads209a1e1fcd1a…Get

Frequently asked

Does SL Quantum Factory work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version SL Quantum Factory declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which platform or loader does SL Quantum Factory support?

NeoForge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for SL Quantum Factory?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the modpack itself, so on an older supported Minecraft the answer is that version's Java, not this one.

How do I install SL Quantum Factory?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download SL Quantum Factory safely?

Start with the author's page on CurseForge, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

Re-ConsoleA continued Legacy Console Edition experience, expanded upon with modern Java Edition content and QoL! (An Official Legacy4J Project)MAX FPS: Optimized🚀 MAX FPS WITHOUT UNNECESSARY MODS! Only 16 optimization mods - NOTHING EXTRA! ✅ ALL MAJOR VERSIONS ⚡ INSTALLS ON ANY LAUNCHER! (Guide below)PacktrixPre-packed Official Modpack containing Patrix Resource Pack for easy install using Fabric/Quilt.Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.ElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 ✔OptimumFuse[1.21.5] [Fabric📜] An open-source modpack that improves the game's performance and visuals, inspired by OptiFine, while staying true to the vanilla Minecraft experience.

Last checked 1 mo ago against CurseForge. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .