openssl-prime

OpenSSL command to compute prime numbers.

TLDR

Generate a 2048bit prime number and display it in hexadecimal

$ openssl prime -generate -bits 2048 -hex

Check if a given number is prime

$ openssl prime [number]

SYNOPSIS

openssl prime [-help] [-hex] [-generate] [-bits num] [-safe] [-provider name] [-provider-path path] [-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: Generate hex output.
-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
-propquery propq

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

-checks num: This parameter is ignored.

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>.