I just ran the following Python code on Python 3.12.10:

from random import seed, randint

SEED = "" # Will be revealed at market resolution
seed(SEED)

n = 0
while n % 10 != 3: n = randint(10**11,10**12-1)
print(n)

(This code generates a random 12-digit number that ends in the digit 3.)

This market resolves YES if this number is squarefree (not divisible by k^2 for any positive integer k>1) and NO otherwise.

sha256 hash of SEED and the value of n (salted):

36556e91e2fd74e9c783fdb2b84053e2e598c87659d249f69703f0d0d61f71e8

Obviously, I will not bet.