Sum of three cubes for 42 finally solved
09-14-2019, 09:14 PM (This post was last modified: 09-14-2019 09:20 PM by Gerson W. Barbosa.)
Post: #4
 Gerson W. Barbosa Senior Member Posts: 1,429 Joined: Dec 2013
RE: Sum of three cubes for 42 finally solved
(09-14-2019 06:11 PM)DA74254 Wrote:  ...and the fun part; the HP/Free/DM42 is not able to calculate it's own self

34 significant digits are not enough for the task. That would require at least 50. Not a problem for the HP 50g in exact mode, though:

'(-80538738812075974)^3+80435758145817515^3+12602123297335631^3'

EVAL ->

42

PS.: Unfortunately there are no solutions for 49 and 50.
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 Messages In This Thread Sum of three cubes for 42 finally solved - Gerson W. Barbosa - 09-14-2019, 03:20 PM RE: Sum of three cubes for 42 finally solved - Tugdual - 09-14-2019, 05:03 PM RE: Sum of three cubes for 42 finally solved - DA74254 - 09-14-2019, 06:11 PM RE: Sum of three cubes for 42 finally solved - Gerson W. Barbosa - 09-14-2019 09:14 PM RE: Sum of three cubes for 42 finally solved - Albert Chan - 09-15-2019, 04:20 PM RE: Sum of three cubes for 42 finally solved - Jaco@cocoon-creations.com - 09-15-2019, 12:37 PM RE: Sum of three cubes for 42 finally solved - DA74254 - 09-15-2019, 07:19 PM RE: Sum of three cubes for 42 finally solved - Jaco@cocoon-creations.com - 09-15-2019, 11:51 PM RE: Sum of three cubes for 42 finally solved - Paul Dale - 09-15-2019, 06:29 AM RE: Sum of three cubes for 42 finally solved - StephenG1CMZ - 09-16-2019, 07:28 AM RE: Sum of three cubes for 42 finally solved - DA74254 - 09-16-2019, 05:38 PM RE: Sum of three cubes for 42 finally solved - Tugdual - 09-27-2019, 10:52 PM

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