Starting HP25 programs with numbers

[Thomas Okken]

(11-24-2017 09:25 PM)teenix Wrote:  

(11-24-2017 03:18 PM)Thomas Okken Wrote:  HP Journal, November 1976, pp. 16-17, has a sidebar titled The New Accuracy: Making 2^3 = 8, included in the MoHPC document set, which mentions using extra digits for intermediate results. It doesn't say how many, and it does indicate that this extra internal precision was not used for all functions. It does mention using a 13-digit approximation of pi internally, for argument reduction.

some 2^3 results
Classics/HP25
X = 08000000002000 (8.000000002)
HP65/HP67/HP22/HP27/HP25c/HP34c/HP19c
08000000000000 (8.00)
HP21
X=07999997770000 (7.99999777)

cheers

Tony

I'm seeing several differences between these results and Joe Horn's earlier post For which models is 2^3>8?
I'm particularly surprised at seeing the 25 and 25C Return different results, and the 65 getting it right...