Factoring database - Page 140

cmd · 2013-12-24, 22:08

do not worry ... be that Alan would like to thank Elizabeth

Batalov · 2013-12-24, 22:39

Wouldn't you have guessed who "that clown" was?

Batalov · 2014-01-03, 08:09

Having a generated SNFS polynomial for a prime is a bit redundant, maybe?

Mini-Geek · 2014-01-03, 13:07

"Silvester/Euclid sequence"s should not when a prime term is reached (by the definitions at Wikipedia), but they do. E.g. http://factordb.com/sequences.php?se...20&fr=0&to=100

richs · 2014-02-09, 17:36

Some clown has input hundreds of composites this morning all with the factor 400000000000000000000000000000000000000000000000019570549.

Stargate38 · 2014-02-13, 22:48

I'm guessing it's cmd again. Someone should PM him about this.

EDIT: I just noticed that cmd is banned. Is that because of the db flooding?

CRGreathouse · 2014-02-25, 14:24

I don't know if syd is listening, but I wanted to report an error of sorts: it (the parser?) fails on

n^n + (n-1)^(n-1)*(-1)^n

and even if I try to trick it with

n^n + (n-1)^(n-1)*(0-1)^n

it still has trouble.

RichD · 2014-02-25, 19:46

This is just a guess.

Since the sign is applied to the larger of the two summation terms, every other number would be negative. I don't think FDB plays well with negative numbers.

Edit: Never mind, I read it wrong.

henryzz · 2014-02-26, 09:11

Even as simple as 2*(-1)^(n) doesn't work. It doesn't seem to be able to handle (-1)^n

RichD · 2014-02-26, 13:41

I noticed that too.

If you substitute ((n-1)-n) for (-1), it seems to work.

Stargate38 · 2014-06-17, 20:53

This works for 10≤n≤59:

2^n-((((n-1)-n)^n)*911)=2^n-(-1^n) (use the left-side equation on the db)

But when you get to n≥60, it says "Error: Negative".

2^60-((((60-1)-60)^60)*911)=2^60-911=1152921504606846065

It's a positive number! In fact, replacing 60 with any number ≥10 will ALWAYS result in a positive number. I don't understand what would cause it to act as if (-1)^60=-1.

That doesn't make any sense whatsoever.

2014-01-03, 08:09	#1532
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 2506₁₆ Posts	Having a generated SNFS polynomial for a prime is a bit redundant, maybe? Attached Thumbnails

2014-01-03, 13:07	#1533
Mini-Geek Account Deleted "Tim Sorbera" Aug 2006 San Antonio, TX USA 4267₁₀ Posts	"Silvester/Euclid sequence"s should not when a prime term is reached (by the definitions at Wikipedia), but they do. E.g. http://factordb.com/sequences.php?se...20&fr=0&to=100 Last fiddled with by Mini-Geek on 2014-01-03 at 13:09

2014-02-13, 22:48	#1535
Stargate38 "Daniel Jackson" May 2011 14285714285714285714 1227₈ Posts	I'm guessing it's cmd again. Someone should PM him about this. EDIT: I just noticed that cmd is banned. Is that because of the db flooding? Last fiddled with by Stargate38 on 2014-02-13 at 22:50 Reason: Noticed that cmd's been banned.

2014-02-25, 19:46	#1537
RichD Sep 2008 Kansas 2⁴·211 Posts	This is just a guess. Since the sign is applied to the larger of the two summation terms, every other number would be negative. I don't think FDB plays well with negative numbers. Edit: Never mind, I read it wrong. Last fiddled with by RichD on 2014-02-25 at 19:55 Reason: Thought n-1 was n+1.

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2013-12-24, 22:08	#1530
cmd "(^r'°:.:)^n;e'e" Nov 2008 ;t:.:;^ 3E7₁₆ Posts	do not worry ... be that Alan would like to thank Elizabeth

2013-12-24, 22:39	#1531
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 2·7·677 Posts	Wouldn't you have guessed who "that clown" was?

2014-02-09, 17:36	#1534
richs "Rich" Aug 2002 Benicia, California 2432₈ Posts	Some clown has input hundreds of composites this morning all with the factor 400000000000000000000000000000000000000000000000019570549.

2014-02-25, 14:24	#1536
CRGreathouse Aug 2006 13533₈ Posts	I don't know if syd is listening, but I wanted to report an error of sorts: it (the parser?) fails on n^n + (n-1)^(n-1)(-1)^n and even if I try to trick it with n^n + (n-1)^(n-1)(0-1)^n it still has trouble.

2014-02-26, 09:11	#1538
henryzz Just call me Henry "David" Sep 2007 Cambridge (GMT/BST) 2³×3×5×7² Posts	Even as simple as 2*(-1)^(n) doesn't work. It doesn't seem to be able to handle (-1)^n

2014-02-26, 13:41	#1539
RichD Sep 2008 Kansas 2⁴×211 Posts	I noticed that too. If you substitute ((n-1)-n) for (-1), it seems to work.

2014-06-17, 20:53	#1540
Stargate38 "Daniel Jackson" May 2011 14285714285714285714 3×13×17 Posts	This works for 10≤n≤59: 2^n-((((n-1)-n)^n)911)=2^n-(-1^n) (use the left-side equation on the db) But when you get to n≥60, it says "Error: Negative". 2^60-((((60-1)-60)^60)911)=2^60-911=1152921504606846065 It's a positive number! In fact, replacing 60 with any number ≥10 will ALWAYS result in a positive number. I don't understand what would cause it to act as if (-1)^60=-1. That doesn't make any sense whatsoever.