OPENSSL-PRIME(1ossl)

NAME
openssl-prime - compute prime numbers

SYNOPSIS
openssl prime [-help] [-hex] [-in] [-generate] [-bits num] [-safe] [-provider name] [-provider-path path] [-provparam [name:]key=value] [-propquery propq] [-checks num] [number ...]

DESCRIPTION
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.

OPTIONS

-help
    Display an option summary.

-hex
    Enable hex format for output from prime generation or input to primality checking.

-in Provide file names containing numbers for primality checking.

-generate
    Generate a prime number.

-bits num
    Generate a prime with num bits.

-safe
    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
-provparam [name:]key=value
-propquery propq
    See "Provider Options" in openssl(1), provider(7), and property(7).

-checks num
    This parameter is ignored.

COPYRIGHT
Copyright 2017-2025 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.