Yeah, when the story was written that SCP number didn't exist yet, so it was a safe unused number. Unfortunately not anymore. SCP-4987 is also explained in the

Yeah, when the story was written that SCP number didn't exist yet, so it was a safe unused number. Unfortunately not anymore. SCP-4987 is also explained in the first chapter, for a slightly less spoilery link. https://scp-wiki.wikidot.com/we-need-to-talk-about-fifty-five https://scp-wiki.wikidot.com/we-need-to-talk-about-fifty-fiv...