Happy pi day - March 14th

Discussion about ZX80 / ZX81 Software
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ZX79
Posts: 5
Joined: Wed Apr 06, 2016 9:36 pm

Happy pi day - March 14th

Post by ZX79 » Thu Mar 14, 2019 7:21 pm

It was reported today that the record for pi is 31 trillion digits.

I don't know if this has been established already, if not, as a pi day challenge:

What is the most accurate approximation of pi that can be calculated using either the expanded or unexpanded ZX80?

Here are some suggestions for calculating pi:

https://en.wikipedia.org/wiki/Approximations_of_π
www.mathworld.wolfram.com/PiApproximations.html

Note, 10 PRINT "3.141592653589793" or similar, does not count. :-)

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GCHarder
Posts: 213
Joined: Sat Dec 14, 2013 7:46 pm

A Program to Calculate Pi

Post by GCHarder » Tue Apr 16, 2019 10:26 pm

The author claims over 8000 decimal places in 16K. Presumably more with extended RAM.

Regards;

Greg
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