FactorDB PRP's

[schickel]

Originally Posted by chris2be8

My first thought was to click the (show) link to get the decimal expansion of it and check that ECM and Primo are working on the same number as factordb.

Then I tried experimenting with that approach. bc says that the decimal expansion mod 3520514800699633460823911989 is zero. And when I put (776*776##+1)/92857/3520514800699633460823911989 into factordb it shows a composite matching the cofactor schickel found. So I think factordb is confused, it knows of the factor of the PRP but still thinks it's PRP.

I think this needs SYD to act.

Chris

I kind of figured that. I guess I could reference these messages in the "problems" thread. I figured it wasn't really critical, though, since I don't know how much free time Syd has.