[Andi47]

Originally Posted by Stargate38

Here's a poly from factordb for 919⁸⁷-1 (166 digit cofactor): http://www.factordb.com/snfs.php?id=1100000000225474717

Originally Posted by frmky

This auto-generated polynomial doesn't take advantage of the known algebraic factor. I agree that the original sextic is the obvious choice.

Originally Posted by wblipp

BAD CHOICE.

This is difficulty 258 digits, MUCH MUCH harder than the 178 digits example I gave.

It looks like the factordb's polynomial finder needs to learn some tricks about removing algebraic factors.

William

I just posted the above quotes to the factordb thread to make Syd aware of those.