openssl-prime

tests numbers for primality or generates prime numbers

TLDR

Check if number is prime

$ openssl prime [number]

Check hex number

$ openssl prime -hex [hex-number]

Generate random prime

$ openssl prime -generate -bits [256]

Generate safe prime

$ openssl prime -generate -bits [256] -safe

SYNOPSIS

openssl prime [options] [number]

DESCRIPTION

openssl prime tests numbers for primality or generates prime numbers. Uses Miller-Rabin primality testing. Useful for cryptographic applications requiring prime numbers.

PARAMETERS

-hex

Input/output in hexadecimal.

-generate

Generate a prime number.

-bits n

Number of bits for generation.

-safe

Generate safe prime (p where (p-1)/2 is also prime).

-checks n

Number of Miller-Rabin tests.

INSTALL

sudo apt install openssl

sudo dnf install openssl

sudo pacman -S openssl

sudo apk add openssl

sudo zypper install openssl

brew install openssl

nix profile install nixpkgs#openssl