We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives the random number
generator a better chance to gain enough entropy.
+++++++++++++++++++++++++++++++++++...++++++++++++++++++++.++++++++++++++++++++.+++++++++++++++...+++++++++++++++.+++++...++++++++++++++++++++..+++++.>+++++........+++++

Not enough random bytes available.  Please do some other work to give
the OS a chance to collect more entropy! (Need 284 more bytes)