How many loci in your longest continuous memory palace?

As a memory enthusiast, it got me wondering: how long is your longest palace?

P.S.
I’ve recently been thinking about creating a palace with 400 locations from a path I used to take when I was little. I thought it would be a fun little goal to challenge myself.

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My longest has 250 locations. On each I store a 4 digit number. In total this gives me 1000 digits of Pi.

But I must say, I highly prefer shorter routes <50

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I’m at 243 out of a planned 283 for a book I’m memorizing. What are you planning on using 400 loci for?