Another way to look at this is that the number of our Matches is about doubling every 14 months. So 14 months from now each TG will have twice as many Matches. Some may look like pileups, but they are just growing TGs as more Matches are reported. Jim - www.segmentology.org > On Dec 13, 2015, at 5:56 AM, Andreas West via <genealogy-dna@rootsweb.com> wrote: > > Hi everyone, > > I hope we can find some consensus here and maybe some of you know even what > number (of matches at a certain loci) is used by AncestryDNA to identify > pileups. > > We're obviously not talking about 1000 here as that would give us 499500 > 1-to-1 comparisons to run between the 1000 matches. That's the main reason why > DTC DNA testing companies (and also GEDmatch) are interested to identify > pileups to limit useless calculations (which in the end will still not find a > single triangulated group (maybe) or it's too far back anyway, see the Timber > algorithm used by AncestrDNA to cut matches. > > a) I have 97 matches (at the same loci) for one of my kits (at the "X" > chromosome interestingly, it's a female person), which means 4656 > combinations. Is that number already a pileup? > > How about: > > b) 52 matches = 1326 combinations > > c) 36 matches = 630 combinations > > d) 23 matches = 253 combinations > > e) 18 matches = 153 combinations > > Where is the line to draw? At a, b, c, d, e or where? > > > What is the largest number of matches that you have in your triangulated > groups? > > We obviously don't want to miss out a large TG as it also means a lot of > people can "crowdsource" together and identify the CA much quicker than a > group of 3 can (usually means also more family trees to compare with). > > Thanks for your answers! > > Andreas (WEST) born BASSO > >