Frozen cookies detected a x10655 period. How?

I was away for a while and suddenly it said i got x10655 for some time. Anyone have any idea how that came to be?

The previous highest i saw was x7777 for x7 + x1111

Sadly enough it was an ascension ago, and only just realized it was something special. So can't screenshot it

EDIT: i might be remembering it wrong, or it might be a typo on frozen cookies site. But 16665 is 15 x 1111 with both dragon flights combined