Rust: 128 bit integers preparing to be released

Re:Rust: 128 bit integers preparing to be released by gravypod on Saturday December 03, 2016 @11:18PM (#13098766)

For finance probably but it's mostly useful for statistics from what I understand.

I know fortran and Cobol code that banks use and is used for science (tm) often defines numbers this large for certain operations.

One such i can think of is a map reduce of large datasets. Let's say you want to find as a result a huge sum. 2^128 is a bit bigger then 2^64 and that difference may be big enough to provide the computation needed for getting to Mars rather then getting to the moon on 2^8 machines.

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Re:Rust: 128 bit integers preparing to be released by foota on Sunday December 04, 2016 @12:07AM (#13098866)

Fun fact: there are ~2^50 millimetres from here to mars

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Re:Rust: 128 bit integers preparing to be released by Keyframe on Sunday December 04, 2016 @05:59AM (#13099558)

128i[3] would be enough for 390x observable universe discrete grid in Euclidean space with nanometer precision. Or 0.39 observable universe with picometer resolution.

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Re:Rust: 128 bit integers preparing to be released by spladug on Sunday December 04, 2016 @02:32AM (#13099174)

There are? It looks closer to 2^14. 2^50mm is around 7.5 au. Sorry to nitpick, but I thought this was a super interesting point!

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Re:Rust: 128 bit integers preparing to be released by foota on Sunday December 04, 2016 @03:17AM (#13099263)

I rounded a bit over-zealously, thanks for nit picking. It is indeed 2^47.6333. (also assuming you meant 47 not 14.)

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Re:Rust: 128 bit integers preparing to be released by spladug on Monday December 05, 2016 @03:04AM (#13104047)

Well, that's embarrassing. 2^47 it is! :)

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Re:Rust: 128 bit integers preparing to be released by Dylan16807 on Sunday December 04, 2016 @02:59AM (#13099229)

I assume you meant to type 47 rather than 14?

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Re:Rust: 128 bit integers preparing to be released by leereeves on Sunday December 04, 2016 @12:43AM (#13098926)

What number in finance is bigger than 2^64?

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Re:Rust: 128 bit integers preparing to be released by wtallis on Sunday December 04, 2016 @02:20AM (#13099137)

The sum of the whole planet's annual GDPs, expressed as US dollars with a precision of cents, requires about 53 bits. Choose a smaller unit or start considering long time spans, and you can easily get uncomfortably close to overflow.

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Re:Rust: 128 bit integers preparing to be released by leereeves on Sunday December 04, 2016 @09:20AM (#13100057)

Why would you express GDPs, which are estimated to an accuracy of millions of US dollars, with a precision of US cents?

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Re:Rust: 128 bit integers preparing to be released by wott on Sunday December 04, 2016 @05:14AM (#13099477)

Riches are getting richer.

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