Starting HP25 programs with numbers

11242017, 02:36 PM
Post: #6




RE: Starting HP25 programs with numbers
(11242017 12:14 PM)Dieter Wrote: BTW, comparing both machines, it is nice to see what a difference one year makes: The 1976 HP67 already uses 13digit internal precision while the HP25 still has to rely on merely 10 digits for internal intermediate results. Consequently the infamous 3^{201} example has only 6 (!) correct digits (after rounding). I don't think the HP67 has higher internal precision than the HP25, both represent a number as 10 digit mantissa and 3 digit exponent with sign. Perhaps the 15digit HP67 display suggests a higher precision. It can display the full mantissa all the time, while the 12digit HP25 display shares the display between mantissa and exponent, it shows only 8 mantissa digits when an exponent is displayed. Bernhard That's one small step for a man  one giant leap for mankind. 

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