BGP prefix filter list

[Baldur Norddahl]

Hello

This morning we apparently had a problem with our routers not handling 
the full table. So I am looking into culling the least useful prefixes 
from our tables. I can hardly be the first one to take on that kind of 
project, and I am wondering if there is a ready made prefix list or similar?

Or maybe we have a list of worst offenders? I am looking for ASN that 
announces a lot of unnecessary /24 prefixes and which happens to be far 
away from us? I would filter those to something like /20 and then just 
have a default route to catch all.

Thanks,

Baldur