(O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.)  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: (O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.) (/thread152601.html) 
(O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.)  Gerson W. Barbosa  07042009
Re: (O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.)  Eddie W. Shore  07042009 HAPPY 4TH OF JULY!
Happy July 4th, 2009 as "identified" by my HP71B IDENTIFY !!!  Valentin Albillo  07052009
... correct to 10 digits ! ... :)
Best regards from V.
Re: Happy July 4th, 2009 as "identified" by my HP71B IDENTIFY !!!  Gerson W. Barbosa  07052009 Hi Valentin, 7.042009002 on the 15C and 7.04200900084 on the 33s. Yes, I know your HP71B IDENTIFY. Should have used it. Anyway, I spent no more than 5 minutes doing it by hand on the 33s. By the way, I tried 7.04000000001 on Plouffe's inverter but it wouldn't find anything closer... Best regards, Gerson.  P.S.: Another one just worked out to celebrate the 30th birthday of the HP41C:
'(45/2+1/47075)/pi' => 7.1619792009 Edited: 5 July 2009, 1:27 p.m.
Re: (O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.)  Paul Dale  07052009 Not that it is of any relevance to where I live of course, but how about these two gems:
4 SIN e^x >H.MS 6 +
The first is good in degrees mode on many/most scientific models. The second works on a 12c and is only one operation longer.
Re: (O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.)  Gerson W. Barbosa  07052009 Getting them in just a few steps is very hard. I would guess you have written a special software to find them... If such is the case, it is interesting just the same. Twice as much steps on the 12c but relevant to where I live:
EEX 2 12x ENTER 7 e^x EEX 3 / LN  LN
It works with the 12c default FIX 2 (but would work up to FIX 7). Regards, Gerson. P.S.: Not so exact but works with FIX 2 and takes the same number of steps it would need to just writing the date:
EEX 2 12x LN
Edited: 5 July 2009, 8:27 p.m.
Re: (O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.)  Paul Dale  07052009 Quote: Yes, I do have a little helper program that simplifies searching for these :) It started off just applying a set of functions to a value and printing the nearer misses. Later, it grew to allow several function applications. Now it is closer to a minirpn calculator that does a real search. My goal is to ultimately have it do an automatic search. I've been meaning to finish it and clean it up so I can post it online for one and all to use. When I get some time and motivation...
 Pauli
Re: (O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.)  Gerson W. Barbosa  07062009 Quote: Looking forward to it! Quite useful when one wishes to save some steps when entering constants in programs. For other applications, Inverse Symbolic Calculator might be an option. It correctly identifies 7.04200892003 as '7+2/33*LN(2)' but doesn't simplify it (Advanced lookup). However it fails for 7.04200900084: it just returns "Wow, really found nothing." That'll require Valentin's HP71B program (Datafile V26N2P24, March/April 2007). Regards,
Gerson.
Re: (O.T.) Happy 'XROOT(9,10561572*EXP(2))/sqrtLN(pi)' ! (N.T.)  Valentin Albillo  07072009 Hi, Gerson:
returns "Wow, really found nothing." That'll require Valentin's HP71B program (Datafile V26N2P24, March/April 2007)." If using the European date format instead of the US one, i.e., 4.072009, my HP71B IDENTIFY program provides:
which is correct to 11 digits.
Best regards from V.
