Where can I download decimals of Pi?
It must be in chunks so that I can download with a particular offset. It must be public domains, without any restrictions before download.
The site with most decimals wins.
asked Nov 17, 2014 at 8:17
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2 Answers
UPDATE: Unfortunately this website is not available anymore, see philshem's comments below for a potential? workaround.
This Japanese site has downloadable chunks up to 13x10^12:
Web site: http://piworld.calico.jp/estart.html
There are 130000 files (pi-0001.txt-pi-130000.txt), each chunk is a ZIP file about 55MB (so it's around 7.15TB in total, 15.34TB uncompressed).
No registration, agreement or anything needed.
answered Nov 17, 2014 at 8:20
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as of 2016, the download is no longer available. web.archive.org/web/20161007132132/http://piworld.calico.jp/… - and the current link is dead– philshemCommented Feb 20, 2020 at 8:09
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seems some downloads are available on the archive: e.g. web.archive.org/web/20150917224503/http://piworld.calico.jp/…– philshemCommented Feb 20, 2020 at 8:15
Based on the discussion here, it may be faster to calculate digits of pi rather than download them.
I know you say you don't care, but I seriously suspect your cpu can calculate them faster than your network card is capable of downloading them.
Given the last digit and the current state of the calculator used to generate it, the next digit can be found in constant time. It doesn't get progressively harder like finding the next prime does.
There are some tools to calculate on your own:
- y-cruncher
- PiFast
- SuperPi
- on Ubuntu:
sudo apt-get install pi, and thenpi 100to arbitrary precision (source and package)
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The said paragraph in that discussion comes with zero reference, and it only says "I seriously suspect".– Nicolas Raoul ♦Commented Nov 18, 2014 at 4:36
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35 minutes to calculate 100m decimals on my reasonably new laptop (using
pipackage on non-virtual Ubuntu), 10 seconds to download the same as a 57MB file. Conclusion: calculating is 30 times slower than downloading.– Nicolas Raoul ♦Commented Nov 18, 2014 at 4:49 -
@NicolasRaoul I tried the download speed and it estimates 6 minutes for a file (maybe faster if you are in Japan). i.imgur.com/PXsYmPu.png It would be interesting to do proper benchmarking.– philshemCommented Feb 25, 2015 at 20:19
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I downloaded the first 10 files (Germany, VDSL). Average download time per file is 69.2s.
pitakes 7:33.14 total Commented Feb 26, 2015 at 13:58
