My reviews & how-tos for adding machines and other antique calculating devices.
Curated by: Chris Staecker (120 videos)
Factor stencils based on a design from the 1920s by D. N. Lehmer. His will factor any number up to 3,000,000,000,000. Mine are smaller, so only factor up to 200,000. This is episode 37 of my video series about calculating devices. Visit my site for PDFs and SVGs to download and make your own, and more detail on how to use them: https://faculty.fairfield.edu/cstaecker/machines/factorstencils.html Lehmer seive photo by Marcin Wichary, licensed cc-by. End song inspired by "Hotter Than a Molotov" by The Coup. Chris Staecker webarea: https://faculty.fairfield.edu/cstaecker