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-   -   Thread for posting tiny primes (https://www.mersenneforum.org/showthread.php?t=13650)

CRGreathouse 2010-09-07 20:43

[QUOTE=3.14159;228910]See [URL="http://factordb.com/search.php?query=835287624561584641455555490282511"]here[/URL]. There is nothing special about 835287624561584641455555490282511.[/QUOTE]

How does that tell me there's nothing special about it?

[QUOTE=3.14159;228910]I never said he could not. Just don't base it on mine. End of story.[/QUOTE]

How do you propose to stop him?

3.14159 2010-09-07 20:45

[QUOTE=Charles]How does that tell me there's nothing special about it?
[/QUOTE]

Not a Proth, Mersenne, or Fermat number, not a factorial/primorial/k-b-b number, nothing special about it. An odd prime number is all.

[QUOTE=Charles]How do you propose to stop him?
[/QUOTE]

Let's clear this up: sm88 never intended to make any list, he was making modifications to my list. Therefore, there is nothing to stop and this is irrelevant.

kar_bon 2010-09-07 20:46

[QUOTE=3.14159;228910]See [URL="http://factordb.com/search.php?query=835287624561584641455555490282511"]here[/URL]. There is nothing special about 835287624561584641455555490282511.
[/QUOTE]

So you only decide if the number is general or not?

CRG, you can post more such numbers, he even can't figure it out of his own (your number would be rank #1 if I/you have not mentioned it) and I will not do such search again!

3.14159 2010-09-07 20:48

[QUOTE=Karsten]So you only decide if the number is general or not?
[/QUOTE]

If there are no remarkable/non-trivial properties about the number, it is a general number. Though I suppose I'm wrong there: I can easily set up where it is a factor of a Proth/Generalized Proth, etc.

It seems as if every integer has an interesting property or two.

3.14159 2010-09-07 20:53

Using that number: 311200808643826446977257839095069700 * 2^540 + 1 is divisible by 835287624561584641455555490282511.

124491606493269288006783110814207807 * 150! + 1 is divisible by 835287624561584641455555490282511.

67992905416506165571512904391251448 * 7![sup]60[/sup] + 1 is divisible by 835287624561584641455555490282511.

Etc, etc..

kar_bon 2010-09-07 20:54

[QUOTE=3.14159;228915]If there are no remarkable/non-trivial properties about the number, it is a general number.[/QUOTE]

Your number 835287624561584641455555490282511 = 52205476535099040090972218142657 * 2^4 - 1, so a special form, too!

3.14159 2010-09-07 20:55

@Karsten: See posts 400 and 401.

CRGreathouse 2010-09-07 20:59

[QUOTE=3.14159;228915]If there are no remarkable/non-trivial properties about the number, it is a general number.[/QUOTE]

That doesn't help, because we don't know what "remarkable" or "non-trivial" properties are. This is a standard fallacy of definition.

In particular, you haven't given a test that lets us determine, unambiguously, whether a number is general or not.

3.14159 2010-09-07 21:00

[QUOTE=Charles]In particular, you haven't given a test that lets us determine, unambiguously, whether a number is general or not.
[/QUOTE]

If it's not a Proth/Generalized Proth/k-b-b/Fermat/Generalized Fermat/Cullen-Woodall/Generalized Cullen-Woodall/Mersenne/Fibonacci/Lucas/Generalized Fibonacci, it's a general number.

kar_bon 2010-09-07 21:02

Conclusion?

Every number can submit but you have to be sure, it was tested by trial division only!

So like a log-file with all N mod p or something like a test to verify.

CRGreathouse 2010-09-07 21:03

[QUOTE=3.14159;228922]Ultimately, it seems that no definition would ever work.[/QUOTE]

So the category (and any other that uses the term "general") are ill-defined.


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