50 digits precision handheld calculator is it achievable or not?

01172014, 10:56 PM
Post: #7




RE: 50 digits precision handheld calculator is it achievable or not?
It's been available for many years. It's called the HP 50g with the free LongFloat library installed. LongFloat lets you specify how many digits of precision you want, up to 9999 (really!) and it gives you new functions which use that precision, with guaranteed accuracy. It brilliantly uses the "long real" object type which HP built into the 50g and then never got around to supporting. (N.B. its header is 0263A, not 02955 which is the "extended real" type which only has 15digit mantissas).
50digit arithmetic with the LongFloat library is very fast. 50 digits times 50 digits takes 0.076 seconds. More digits takes longer. For example, finding 500 digits of the square root of 2 takes 2 seconds. If you want a calculator that does 50 digit math, but you don't want to bother installing software on it, I'd be happy to install LongFloat in a 50g and sell it to you. ;) The LongFloat library functions are fully programmable. Accuracy is both globally and locally programmable. The functions include:
<0ΙΈ0> Joe 

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