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SPECIFICTION
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y-cruncher

numberworld.org

Free plan WindowsLinux
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Spec score 7.6 #18 of 31 in PC Overclocking Software

What it is

y-cruncher calculates Pi and other mathematical constants to trillions of digits, and also serves as a multithreaded benchmark and stress-testing program for overclockers and hardware enthusiasts. For most constants, it uses separate algorithms to compute and verify results. Its multithreading uses modern multi-core processors without significantly increasing memory usage, and it supports SIMD instruction sets such as SSE, AVX and AVX512. For computations that exceed available memory, y-cruncher manages swap space and can use multiple drives for disk swapping. It can detect and correct minor errors attributed to hardware instability or software bugs. Windows and Linux downloads are available; the listed requirements are Windows 8 or later, 64-bit Linux, and an x86 or x64 processor. The Linux static build lacks TBB and NUMA binding, while the dynamic build supports all features but is less portable. The free plan permits non-commercial and academic use; commercial-purpose licensing may be available by contacting the developer. Major algorithm redesigns and rewrites are on hiatus, though maintenance and some processor optimizations continue.

Spec sheet

Purpose
y-cruncher computes Pi and other mathematical constants to trillions of digits.Read 8 Oct 2026 · numberworld.org
Platforms
The current release page lists downloads for Windows and Linux, with static and dynamic Linux builds.Read 8 Oct 2026 · numberworld.org
License
Downloading the listed binaries constitutes acceptance of the license agreement.Read 7 Oct 2026 · numberworld.org
Founded
2009Read 28 Sep 2026 · numberworld.org
Benchmarking
The maker describes it as a multithreaded, scalable Pi benchmark used for benchmarking and stress testing by overclockers and hardware enthusiasts.Read 8 Oct 2026 · numberworld.org
Commercial licensing
Commercial use requires contacting the developer, and the license says commercial-use licenses may be available depending on intended usage.Read 8 Oct 2026 · numberworld.org
Developer
The product page identifies Alexander J. Yee as its author.Read 8 Oct 2026 · numberworld.org
Distribution
The license permits mirroring and distributing the software free of charge for any purpose.Read 8 Oct 2026 · numberworld.org
Downloads
The maker lists Windows and Linux downloads; Linux builds are available in static and dynamic versions.Read 7 Oct 2026 · numberworld.org
Error handling
The maker describes the program as semi-fault-tolerant and says it can detect and correct minor errors caused by hardware instability or software bugs.Read 8 Oct 2026 · numberworld.org
Large computations
It manages swap space for computations that need more memory than is available and can use multiple hard drives for faster disk swapping.Read 8 Oct 2026 · numberworld.org
Linux limitation
The static Linux build lacks TBB and NUMA binding; the dynamic build supports all features but is described as less portable.Read 8 Oct 2026 · numberworld.org
Multithreading
Its multithreading can use modern multi-core processors without significantly increasing memory usage.Read 7 Oct 2026 · numberworld.org
Performance
It supports multithreading and SIMD vector instructions including SSE, AVX, and AVX512.Read 8 Oct 2026 · numberworld.org
Requirements
The maker lists Windows 8 or later, 64-bit Linux, and an x86 or x64 processor as system requirements.Read 7 Oct 2026 · numberworld.org
Support and maintenance
The developer says the project is on hiatus for major algorithm redesigns and rewrites, while maintenance and some processor optimizations will continue.Read 7 Oct 2026 · numberworld.org
System requirements
The listed requirements include Windows 8 or later, 64-bit Linux, and an x86 or x64 processor.Read 8 Oct 2026 · numberworld.org
Vectorization
It supports processor SIMD instruction sets including SSE, AVX, and AVX512.Read 7 Oct 2026 · numberworld.org
Verification
For most constants, the program provides separate algorithms for computation and verification.Read 8 Oct 2026 · numberworld.org
Warranty
The license provides the software as is and disclaims warranties, including implied warranties of merchantability and fitness.Read 8 Oct 2026 · numberworld.org

Plans and prices

Non-commercial / academic use Free Non-commercial use; academic use permitted, including commercial technology reviews · commercial-purpose licensing may be available by contacting the developer Read 8 Oct 2026 · numberworld.org

Every y-cruncher plan and price →

Strong points and limits

Strong points

  • Computes and verifies most constants with separate algorithms.
  • Supports SSE, AVX and AVX512 instructions.
  • Can use multiple drives for disk swapping.
  • Free for non-commercial and academic use.

Limits

  • Linux static build lacks TBB and NUMA binding.
  • Dynamic Linux build is less portable.
  • Major algorithm redesigns and rewrites are on hiatus.
  • Commercial licensing requires contacting the developer.

Who it suits

y-cruncher suits users calculating large mathematical constants or benchmarking and stress-testing hardware. Its free plan covers non-commercial and academic use; commercial users need to contact the developer about licensing.

Verdict

y-cruncher combines large calculations with processor benchmarking and error handling. Check the Linux build tradeoffs and license terms for your intended use.

Where Specifiction places it

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