Crossnumber PRIMEr Mystery Cache

The cache is not at the posted coordinates but is less than 1 mile away

A Crossnumber puzzle is just like a Crossword puzzle except that the answers are numbers instead of words.


ACROSS:
A. A prime number
C. A prime number

DOWN:
A. A prime number
B. Digit sum of A down plus 2 (this is also a prime number)

Concatenate the across numbers (A across=XX and C across=YY) and submit the 4-digit number (XXYY) to Certitude for the cache coordinates.

There is room for small trade items and GC's. Don't forget to bring your pen.

Enjoy!

Congratulations to ciarmer on FTS and ElJako98 and GeoTabG on the co-FTF.