Claude, at least 4.5, not checked recently, has/had an obsession with the number 47 (or numbers containing 47). Ask it to pick a random time or number, or write prose containing numbers, and the bias was crazy.

Also "something shifted" or "cracked".

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dhosek 7 hours ago | parent | next [-]

Humans tend to be biased towards 47 as well. It’s almost halfway between 1 and 100 and prime so you’ll find people picking it when they have to choose a random number.

Then there’s the whole Pomona College thing https://en.wikipedia.org/wiki/47_(number)

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vidarh 5 hours ago | parent | next [-]

The whole blue 7 thing [1] and variations is very fascinating, but we don't tend to repeatedly pick the same number in the same exact context, though. That's what made this stand out to me - I had a document where Claude had picked 47 for "random" things dozens of times.

[1] https://en.wikipedia.org/wiki/Blue%E2%80%93seven_phenomenon

I experienced this even second hand when a coworker excitedly told of an encounter with a cold reader, and I knew the answer would be blue 7 before he told me what his guess was. Just his recap of the conversation was enough.

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flawn 4 hours ago | parent | prev [-]

I am biased towards 67

	▲	eloisant 3 hours ago \| parent [-]
		Funny, I didn't know there were 10 years old on hacker news!

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wmf 6 hours ago | parent | prev [-]

Maybe Claude is just a fan of Alias.