I like the creative sources of entropy. :) Thanks! Shame about the Raspberry Pi. I suspect it was the lack of memory that caused the process to be killed -- since the challenge file is ~1.2GB and it is loaded into memory, the 1GB on a standard Pi 3 will not be sufficient. I managed successfully with 2GB (and no swap).
-- Jason Davies, https://powersoftau.plutomonkey.com/
