Timeline for Disproving Euler proposition by brute force in C
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 26, 2016 at 20:48 | comment | added | chux |
@Edward OK. The .x1 field contains the addend. More details added.
|
|
| Oct 26, 2016 at 20:47 | history | edited | chux | CC BY-SA 3.0 |
added 435 characters in body
|
| Oct 26, 2016 at 20:27 | comment | added | Edward |
What's not clear is that in the formulation of the question, a, b and c are individual addends but in your code they appear to be accumulators. Also it's not clear what factor is or why one would adjust it.
|
|
| Oct 26, 2016 at 15:32 | history | edited | chux | CC BY-SA 3.0 |
added 65 characters in body
|
| Oct 26, 2016 at 15:31 | comment | added | Tavian Barnes | @chux Ah okay, I took that as a description of the current code, rather than a direction for the reader. | |
| Oct 26, 2016 at 15:30 | comment | added | chux |
@TavianBarnes The // Adjust to 128 bit type typedef uintmax_t uint_fast128t; is simply a place-holder for whatever 128-bit type a compiler may have access - adjust as needed. __uint128_t is not part of standard C, yet an efficient solution would use some extension such as __uint128_t . IAC, larger than 64-bit math is not needed until factor < 7.
|
|
| Oct 26, 2016 at 15:26 | comment | added | Tavian Barnes |
uintmax_t is not 128 bits on any platform I know of, certainly not x86_64 Linux with gcc. You'll need to use __uint128_t.
|
|
| Oct 26, 2016 at 15:20 | comment | added | chux | @Edward What parts of code were not clear? | |
| Oct 26, 2016 at 3:17 | comment | added | Edward | It's not entirely clear what the code is actually doing mathematically. Could you explain it? | |
| Oct 26, 2016 at 2:49 | history | edited | chux | CC BY-SA 3.0 |
deleted 12 characters in body
|
| Oct 26, 2016 at 2:28 | history | edited | chux | CC BY-SA 3.0 |
added 1957 characters in body
|
| Oct 26, 2016 at 2:03 | history | edited | chux | CC BY-SA 3.0 |
added 1957 characters in body
|
| Oct 25, 2016 at 23:04 | history | answered | chux | CC BY-SA 3.0 |