The Museum of HP Calculators

HP Forum Archive 21

 New Blog: FactorialsMessage #1 Posted by Eddie W. Shore on 20 Oct 2012, 1:42 p.m. The might of the 50g is demonstrated. It think it is the first time I typed a 181 digit number. Program for the 39gii is included. Eddie

 Re: New Blog: FactorialsMessage #2 Posted by Walter B on 20 Oct 2012, 3:27 p.m.,in response to message #1 by Eddie W. Shore Just FYI, all factorials you mentioned in your blog may be calculated directly on a WP 34S in DBLON mode :-)

 Re: New Blog: FactorialsMessage #3 Posted by Paul Dale on 20 Oct 2012, 5:59 p.m.,in response to message #2 by Walter B More importantly, the 34S includes a Log Gamma function which effectively calculates the sum of the logarithms directly. - Pauli

 Re: New Blog: FactorialsMessage #4 Posted by Gerson W. Barbosa on 20 Oct 2012, 7:29 p.m.,in response to message #3 by Paul Dale So does the HP-50g, but the wp 34S is more accurate: ```001 LBL A 002 INC X 003 LNGamma 004 # 010 005 LN 006 / 007 IP 008 RCL L 009 FP 010 10^x 011 END 111 A --> 1.76295255109 x<>y --> 180. ``` On the HP 50g, ```111 ENTER << 1. + LOGGAMMA 10. LN / DUP IP SWAP FP ALOG >> EVAL ``` will return ``` 180. 1.76295255248 ``` Gerson.

 Re: New Blog: FactorialsMessage #5 Posted by Eddie W. Shore on 21 Oct 2012, 11:28 a.m.,in response to message #4 by Gerson W. Barbosa Learning the upgraded WP 34S on my list of things to do.

 Re: New Blog: FactorialsMessage #6 Posted by Bart (UK) on 20 Oct 2012, 6:17 p.m.,in response to message #1 by Eddie W. Shore Quote: It think it is the first time I typed a 181 digit number. Do it on the 50G emulator, then "Save Object". Run HPUserEdit, then import it with "File" -> "Import" and then you can copy the number. (You can also save it as a variable on the real 50G and copy it to a PC with the SD card, and import into HPUserEdit).Thanks for your blogs, they're always interesting.

 Re: New Blog: FactorialsMessage #7 Posted by Eddie W. Shore on 21 Oct 2012, 11:27 a.m.,in response to message #6 by Bart (UK) Quote: Do it on the 50G emulator, then "Save Object". Run HPUserEdit, then import it with "File" -> "Import" and then you can copy the number. (You can also save it as a variable on the real 50G and copy it to a PC with the SD card, and import into HPUserEdit).Thanks for your blogs, they're always interesting. Thank you Bart. Copying the number is a lot easier than typing the number out. Update: Bart, I have posted another entry rearding factorials, basically an introduction to factorials - inspired by my dad. (no programs this time though) Edited: 23 Oct 2012, 9:28 a.m.

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