You got me. My Equifax is only 841.
I'll be honest with you, I was in banking for 25 years and that's only the second 850+ score I've seen. My Transunion in 837, but it generally always runs a few points less. I don't borrow enough to get over 850, haven't gotten a loan for anything in over 10 years, so I get dinged for not enough recent credit.
The richest guy I ever did business with (a bonafide billionaire) had a 660 personal credit score. Reason was he had no credit cards and hadn't borrowed in his personal name in decades. I actually had to get board approval for a waiver to lend the guy's business $10MM because of his low credit score even though he had far more then that on deposit with the bank. The oddities of credit scores and bank policies.
Most recent Trans-Union was 853.....