# What is the largest number arithmetic has been done on?

**URL:** <https://boards.straightdope.com/t/what-is-the-largest-number-arithmetic-has-been-done-on/978590>\
**Category:** Factual Questions\
**Created:** [January 22, 2023, 1:54am UTC](https://boards.straightdope.com/t/what-is-the-largest-number-arithmetic-has-been-done-on/978590 "2023-01-22T01:54:21Z")\
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**Author:** ![Dr.Strangelove](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dr.strangelove/32/6613_2.png) [@Dr.Strangelove](https://boards.straightdope.com/u/Dr.Strangelove)\
**Post date:** [January 22, 2023, 6:34am UTC](https://boards.straightdope.com/t/what-is-the-largest-number-arithmetic-has-been-done-on/978590/14 "2023-01-22T06:34:01Z")

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> [@griffin1977](#):
>
> Though that’s not doing arithmetic on PI itself though is it?

Oh, I almost forgot: for the 100T digits, the primary algorithm they used actually computes \frac{1}{\pi}, not \pi itself. They did a final reciprocal to get pi. That would definitely count as arithmetic performed on \frac{1}{\pi}.

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