openssl-prime:tldr:686e9

The command "openssl prime ${number}" is a Linux command that uses the OpenSSL library to check if a number is prime.

Here's how the command works:

1. "openssl" is the name of the program that is being executed.
2. "prime" is the specific command within OpenSSL that is being used.
3. "${number}" is a placeholder for the actual number that you want to check if it is prime. You would replace "${number}" with the actual number you want to test.

When you run this command, OpenSSL will perform a primality test on the given number. It will check if the number is divisible by any other number except for 1 and itself. If it is not divisible by any other number, OpenSSL will confirm that the number is prime. Otherwise, it will determine that the number is not prime.

For example, if you run the command "openssl prime 13", it will check if the number 13 is prime. In this case, OpenSSL will output "13 is prime" because 13 is indeed a prime number.