Maritza remembers her PIN because it is the product of two consecutive prime numbers that...

If n is one of the prime numbers,
the product of primes is of the order of ${\displaystyle n^2}$, in fact slightly greater.
Currently, integers with squares in the range of 1000 to 1500
${\displaystyle \{32,33,34,35,36,37,38\}}$ of which only 37 is prime.
Prior to and following 37 are the prime numbers 31 and 41.
As ${\displaystyle 37\times 41=1517}$ and ${\displaystyle 31\times 37=1147}$
PIN number is 31 and 37.