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Reading this comment makes me glad I use a different (but still nerdy) pin :)

Is it in here? 4242 9801 1089 1024 3141 1415 2718 1412 1732 1428 2997 6626 6022

1337?

One approach to PINs is to take two numbers that are familiar, but aren't related to each other and interleave them.

Basically the same principle as correct horse battery staple.