Multiprecision arithmetic internals

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OpenSSL includes an implementation of multiprecision arithmetic, used for dealing with the large numbers used in public-key cryptography and a few other cryptographic algorithms.

"bn(3) overview"[Broken Link]

"bn_internal(3)"[Broken Link] , BIGNUM library internal functions "to facilitate debugging and extending the library. They are not to be used by applications."

Other popular multiprecision libraries and tools that perhaps might be useful for testing OpenSSL's multiprecision implementation include: GMP, the bc programming language, etc.