Other Factordb Problems

[charybdis]

They must have increased the number of IPs they're (ab)using.

If the IPs are all in the same range, perhaps a limit on IDs created per appropriately-sized range per hour is the way to go.

[gd_barnes]

Originally Posted by charybdis

They must have increased the number of IPs they're (ab)using.

If the IPs are all in the same range, perhaps a limit on IDs created per appropriately-sized range per hour is the way to go.

I like this idea! But a smart spammer might be using many different random IPs that are difficult to isolate to a specific range. You'd almost have to make it a limit on a specific digit-size for everyone as a whole per hour. But that could have a bad effect on everyone else.

Perhaps a solution would be to require that everyone register their ID and Email with the site. That would challenge the spammer a little more; at least make him work a little harder when using multiple IPs. You'd lose the anonymity that we have now. I would not be opposed to that.

[Happy5214]

Unless the new limits have been eased (which it doesn't sound like they have), I think the return of the spam puts to rest any idea that this spammer is a misguided, rather than malicious, individual, as some people here had posited/hoped. Markus should seriously consider contacting the police and/or a security consultant as the next step.

[xilman]

Originally Posted by gd_barnes

I like this idea! But a smart spammer might be using many different random IPs that are difficult to isolate to a specific range. You'd almost have to make it a limit on a specific digit-size for everyone as a whole per hour. But that could have a bad effect on everyone else.

Perhaps a solution would be to require that everyone register their ID and Email with the site. That would challenge the spammer a little more; at least make him work a little harder when using multiple IPs. You'd lose the anonymity that we have now. I would not be opposed to that.

+1

[xilman]

Originally Posted by Happy5214

or a security consultant as the next step.

My consultancy rates are very reasonable.

Depending on the information provided, my rates could be somewhere between zero and a few beers on completion of the contract.

[storm5510]

factordb loses me. I picked a number, a play on my dad's birthday, which is 8 digits and searched. It was there. On the far-left side was "FF" meaning fully factored. Behind the number I searched for were several small numbers. How can something be fully factored if the largest factor is three digits long?

[VBCurtis]

Originally Posted by storm5510

How can something be fully factored if the largest factor is three digits long?

What is it you want to do to the three-digit number to make it more factored?

Are all the smaller numbers supplied by factordb prime?

[storm5510]

Originally Posted by VBCurtis

What is it you want to do to the three-digit number to make it more factored?

Are all the smaller numbers supplied by factordb prime?

To your question, they apppear be: 3, 11, 23, 53, 449.

The number I was goofing with is 18061923. ddmmyyyy. I expected a composite of this size to have a larger factor. Then again, maybe not.

None of this is important. Just a curiosity.

[bur]

The number of prime factors of a number n is on the order of log(log(n)). An 8 digit number can be tentatively expected to have 3 prime factors. So, a 3 digit prime as the largest factor is not that strange.

https://factordb.com/index.php?query...%2Bn&use=n&n=0

[Stargate38]

Has anyone else noticed the typo under More Information for special form numbers? I just now noticed it:

http://www.factordb.com/index.php?id...00004435617556

"Auto-generated SNFS-Polynominal available!" (should be "Polynomial")

How long has it been this way without us noticing?