Artifact Details

Title

Photoelectric Number Sieve Machine ("Gear Machine")

Catalog Number

X85.82

Type

Physical Object

Date

1932

Manufacturer

D. H. Lehmer / Robert Canepa

Place Manufactured

U.S.

Identifying Numbers

model number Number Sieve
serial number 1 (of 1)

Dimensions

overall:

Description

This gear number sieve was constructed to solve number theory problems such as factoring and determining if a number is prime. The machine also had a photo detector and powerful amplifier which was not included in the gift.

Category

Calculator: electromechanical

Credit

Gift of D. H. Lehmer

Lot Number

X85.82