Of say 4096 bits as is a default GPG master key.
I can manage the first one or so almost immediately on Ubuntu. It then runs out of entropy when generating several more RSA keys, and I'm forced by GPG into mouse wiggling and keyboard smashing. More entropy is clearly required in those cases than available from /dev/random.
Is there some measure of the total amount of entropy bits needed to make a single 4096 bit RSA key?
Close but not quite is Detecting the amount of entropy used for random number generation. Nor How to generate 1024-bit RSA key as that only calculates the bits in the final key pair. Some sort of combination is probably required to take into account primacy testing.