2007 iTest Problems/Problem 43

Problem

Bored of working on her computational linguistics thesis, Erin enters some three-digit integers into a spreadsheet, then manipulates the cells a bit until her spreadsheet calculates each of the following $100 \$ (Error compiling LaTeX. Unknown error_msg) -digit integers:

She notes that two of them have exactly positive divisors each. Find the common prime divisor of those two integers.