@cunobaros Sabbath Number as in in if you have sung with anyone who has sung with Black Sabbath etc & I think there is an Asimov number if you have had any writings in short story book that has a relevant chain of Authors. In aside #GNUTerryPratchett was one of the super-connected by having an EBS number combined Erdos Bacon Sabbath he probably had an Asimov number as well it was shown on a website once but i think it disappeared by bitrot & i don't if it was backed up on Archive.org Wayback machine as I can't recall the address.

I think I should have an EBS number but never managed to work it out as have problem working out my Erdos number which i think i should get for being quoted on a paper about the 1st solar garage connected to the UK grid but we might both also get one from our #DiscWorld fandom associations as there was someone who IIRC was doing a PHD on modern folklore sources & used #Discworld fans as sources he came to at least one of the @dwcon events & I think some other Discworld events.