[math-fun] new pi computation, 2700 billion digits... on a PC...!
http://bellard.org/pi/pi2700e9/announce.html was carried out by Fabrice Bellard in base 10 and 16. The computation was checked using the BBP formula for the base 16. It took more than 100 days to compute everything, maybe much more of elapsed time. This is the world record, the previous record was 2576 billion digits. This is an historic moment since it is the first time an ordinary PC does better than a super-computer (and a lot of determination). Congratulations to Fabrice Bellard! simon plouffe
Is Bellard going to release all the digits to the public? It would be nice to extend A032510 <http://www.research.att.com/%7Enjas/sequences/A032510>and A036903 <http://www.research.att.com/%7Enjas/sequences/A036903> (both regarding how far you need to look in pi to see all 10^n strings of n decimal digits as substrings). --Michael On Tue, Jan 5, 2010 at 8:33 AM, Simon Plouffe <simon.plouffe@gmail.com>wrote:
http://bellard.org/pi/pi2700e9/announce.html
was carried out by Fabrice Bellard in base 10 and 16.
The computation was checked using the BBP formula for the base 16. It took more than 100 days to compute everything, maybe much more of elapsed time.
This is the world record, the previous record was 2576 billion digits.
This is an historic moment since it is the first time an ordinary PC does better than a super-computer (and a lot of determination).
Congratulations to Fabrice Bellard!
simon plouffe
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-- Forewarned is worth an octopus in the bush.
Update: I've been talking with Fabrice, and he's now checked for up to 10-digit substrings; see the updated page http://bellard.org/pi/pi2700e9/pidigits.html for data. Checking for 11-digit will be substantially slower, since the straightforward way to do it takes too much RAM. Modeling it as a coupon collector problem indicates a roughly 83% chance that the 2.7 trillion digits will be enough for length 11. --Michael On Tue, Jan 5, 2010 at 9:09 AM, Michael Kleber <michael.kleber@gmail.com>wrote:
Is Bellard going to release all the digits to the public? It would be nice to extend A032510 <http://www.research.att.com/%7Enjas/sequences/A032510>and A036903 <http://www.research.att.com/%7Enjas/sequences/A036903> (both regarding how far you need to look in pi to see all 10^n strings of n decimal digits as substrings).
--Michael
On Tue, Jan 5, 2010 at 8:33 AM, Simon Plouffe <simon.plouffe@gmail.com>wrote:
http://bellard.org/pi/pi2700e9/announce.html
was carried out by Fabrice Bellard in base 10 and 16.
The computation was checked using the BBP formula for the base 16. It took more than 100 days to compute everything, maybe much more of elapsed time.
This is the world record, the previous record was 2576 billion digits.
This is an historic moment since it is the first time an ordinary PC does better than a super-computer (and a lot of determination).
Congratulations to Fabrice Bellard!
simon plouffe
_______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun
-- Forewarned is worth an octopus in the bush.
-- Forewarned is worth an octopus in the bush.
participants (2)
-
Michael Kleber -
Simon Plouffe