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→Supported Architecture
i386 - 32-bit Intel/AMD-compatible
x86_64 - 64-bit Intel/AMD-compatible
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They are instrumental in its design and development. During the development of a fedora release if any of the primary architecture builds fail, the packages cannot be moved onto the repositories. Fedora package maintainers are required to make sure that their package builds properly for this architecture.
There are also a number of secondary archs: