A few sheets of fanfold “computer paper” emerged while tossing stuff out. The first page suggests somebody was trying out some simple programming:
Seven pages later, you can tell an extended-precision library was hard at work:
This being mainframe line printer paper, somebody must have donated it to my heap; I have no memory of ever doing (or needing to do) extended-precision math. That’s my story and I’m sticking with it.
More than you care to know about Powers of Two.