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openssl-prime.1ossl - Man Page

compute prime numbers


openssl prime [-help] [-hex] [-generate] [-bits num] [-safe] [-provider name] [-provider-path path] [-propquery propq] [-checks num] [number ...]


This command checks if the specified numbers are prime.

If no numbers are given on the command line, the -generate flag should be used to generate primes according to the requirements specified by the rest of the flags.



Display an option summary.


Generate hex output.


Generate a prime number.

-bits num

Generate a prime with num bits.


When used with -generate, generates a "safe" prime. If the number generated is n, then check that (n-1)/2 is also prime.

-provider name
-provider-path path
-propquery propq

See "Provider Options" in openssl(1), provider(7), and property(7).

-checks num

This parameter is ignored.

Referenced By

openssl.1ossl(1), openssl-cmds.1ossl(1).

2024-07-09 3.2.2 OpenSSL