Eight Bits of Trust; eMudhra's CA keys cracked in milliseconds

What happened
One of eMudhra's certificate authority private keys is the number 4. Not a number that starts with 4, or the number 4 followed by a few hundred random digits, just, 4... Another one is 56, and another is 115. I know, because I recovered all of them from their
Summary assembled by rule from the sources below