\begin{definition}[Definition:Lehmer's Electromechanical Sieve]
rightLehmer's Electromechanical Sieve
'''Lehmer's electromechanical sieve''' is a device which was invented for the purpose of solving number theory problems, such as:
: determining the prime decomposition of integers
: determining whether an integer is prime.
It consists of:
: a mechanical assemblage of gearwheels
: photo detector
: an electronic amplifier.
It is currently located at the [http://www.computerhistory.org/ Computer History Museum], where its lot number is $\text X 85.82$.
{{NamedforDef|Derrick Henry Lehmer|cat = Lehmer D H}}
\end{definition}