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.
The Smell of Molten Projects in the Morning 
Whoever it was seems to have skipped 2⁰ = 1.
Probably triggered an ABEND and a genuine Core Dump…
Incidentally, are you aware that Abend is German for evening/night?
Yup, we probably learned that in the first week… long before I learned about ABEND codes.