On Tuesday 24 October 2006 19:18, david eddy wrote: > > what happens when a LL test is proved wrong? > Hmm ... the LL test is never wrong, it is a mathematical theorem!
However computations performed in a computer can (and sometimes do) go wrong, for a number of reasons. When a L-L test or double check result is reported, the low 64 bits of the residue (amongst other things) is stored in a database. Periodically the database is scanned; when there are two matching residues for an exponent (with different offsets), it is moved to the "lucas_v" database file whilst any discordant results are moved to the "bad" database file. Regards Brian Beesley _______________________________________________ Prime mailing list [email protected] http://hogranch.com/mailman/listinfo/prime
