1.241 TRILLION DIGITS OF 1.241 TRILLION DIGITS OF p


Between September and December 2002 (over about 600 hours on a HITACHI SR8000/MP machine with 1TB storage) Yasumasa Kanada, and a team of ten, computed 1.03 ×1012 hexadecimal digits, using both

p
=
48 arctan( 1/49 ) +128 arctan

1
57


-20 arctan

1
239


+48 arctan

1
110443


and
p
=
176 arctan

1
57


+28 arctan

1
239


-48 arctan

1
682


+ 96 arctan

1
12943


This was converted to 1.24 ×1012 decimal digits. Kanada estimates the method is about twice the speed of the AGM methods he was previously using - and has other advantages to make such a huge computation feasible.


File translated from TEX by TTH, version 2.20.
On 15 Dec 2002, 19:22.