openssl prime -help

saolasosme

Compute prime numbers.

$ openssl prime -help
Usage: prime [options] [number...]
  number Number to check for primality
 -help         Display this summary
 -hex          Hex output
 -generate     Generate a prime
 -bits +int    Size of number in bits
 -safe         When used with -generate, generate a safe prime
 -checks +int  Number of checks