The cache is not at the posted coordinates.
I've always enjoyed numbers. I remember Johnny Carson telling us that in a couple of hours the time date would be 12345678 or 12:34 on May 6, 1978. Numbers and patterns can be fun. With these given numbers, what is the next number?
47 53 59 61
You can validate your puzzle solution with
certitude.
Unatvat nebhaq naq jnvgvat gb or sbhaq.