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Prime95 vs y-cruncher: catalog facts
Prime95	y-cruncher
Free Free to download and use under the GIMPS free software license.	Free Freeware, free to download and use.
Windows, macOS, Linux	Windows, Linux, Command line
Standard, demanding CPU and memory stress test Builds for Windows, macOS, Linux and FreeBSD	Scales across many CPU cores Established benchmark with published fastest times
Not an OSI open source license Dated interface	Closed source freeware Large computations need a lot of memory and disk space
Downloadable app	Downloadable app
Closed source	Closed source
License: GIMPS free software license	License: Freeware
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.