Factoring database

[wblipp]

Yes, 1100000000003937045 is the factordb id was talking about having failed to get trial factoring. If you click "Primality" and then click "N-1" you get this. But it is easy to see that every prime up to 2557 except 19 divides this. I think it's a bug that this got into the factordb without accurate trial factoring.

[smh]

Originally Posted by cmd

"Lark's brother" often make use of mirror ...
You should also use fishing line behind you to remove your pants, but the first 'Remember to remove "the fish"

|°|

CMD, you've been warned before and i will remove any of your further nonsense posts in this thread.

[Random Poster]

Originally Posted by wblipp

I think it's a bug that this got into the factordb without accurate trial factoring.

There's nothing special about this number; a lot of the recent 7x digit composites had a largest prime factor of only 5 or 6 digits, so obviously some method of inserting numbers to the db doesn't do any checking at all.

[Random Poster]

This page has a typo; "composize" should be "composite".

[kar_bon]

Originally Posted by Random Poster

This page has a typo; "composize" should be "composite".

The Status page got another one:

The point under "The database is running on" says: "Power consumpion".

[rekcahx]

Syd, what ist database's oldest (smallest id) unfactored composite?

[firejuggler]

http://factordb.com/index.php?id=1000000000000001061 seem a good candidate

[kar_bon]

Originally Posted by firejuggler

http://factordb.com/index.php?id=1000000000000001061 seem a good candidate

Not for a long time, see NFS@Home.

[firejuggler]

i think that the sieving will take a few more weeks/months, therefore comply with the 'oldest' composite;p

[schickel]

I was looking at some of the longest sequences and ran acorss a problem with one. 933436 doesn't display anything, just a blank screen (althogh it does take ~8800 quesries to do it).

I got it to "display last element" once, and it reported:

Originally Posted by factordb

Error on number 105989556098056466581697879875892687048953224897793946376047041572910440644406075202864343735423530347128160400

Searching on that number shows it as FF, but the factorization is wrong:

FF 111 (show) 1059895560...0<111> = 2^4 · 5^2 · 29510540564780279914245519428917891801999<41> · 1340002219...3<54>

Pasting it into Dario's applet shows this factorization:

Originally Posted by Alpertron

105989556098056466581697879875892687048953224897793946376047041572910440644406075202864343735423530347128160400
= 2 ^ 4 x 5 ^ 2 x 46073 x 1454366651 (Curve 1) x
29510540564780279914245519428917891801999 (Curve 14) x
134000221958505746224764118830141984940667012130018613

A little bit of a difference.....

[wblipp]

More Broken

Here is a simpler case that is broken

677^7-1 shows as 20 digits and fully factored

http://factorization.ath.cx/index.php?query=677^7-1

But the factorization shown is for 677-1