On May 10, 2017, at 8:01 AM, Brian Berg <brianberg@gmail.com> wrote:

A new story by John Markoff posted as a blog to the Computer History Museum's website.  I did not find anything about this in the Thomas Haigh, et al. book ENIAC in Action book.  Brian Berg

This article gives background on the program that Derick and Emma Lehmer were working on that weekend:

Liesbeth De Mol, Maarten Bullynck. A Week-End Off: The First Extensive Number-Theoretical Computation on the ENIAC. Lecture notes in computer science, springer, 2008, 5028, pp.158-167. <10.1007/978-3-540-69407-6 19>. <hal-01396832>
http://hal.univ-lille3.fr/hal-01396832

Also, in the second photograph, Lehmer is on the left, not the right. (I’ve reported this to Markoff.)


Paul McJones