Calculation of pi on many machines

[EdS2]

(03-08-2021 02:30 AM)berndpr Wrote:  But I got another program from a japanese person (Hiro510) which is using different version of pi/4 approximations (like Leibniz, Machin, Klingenstirna, Gauss, Störmer, Takano Kikuo and 2 unknown).

Not the same program or the same author, I think, but perhaps of interest: in my web travels I've just found a ruby program by "komasaru" which evaluates 8 different arctangent formulas:
1:Machin, 2:Klingenstierna, 3:Euler, 4:Euler(2)
5:Gauss, 6:Stormer, 7:Stormer(2), 8:Takano
Looks like there are versions in other languages too - see here.