Question 1171548
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<pre>

Let  {{{n^2}}}  be Jason's age this year (= current age).


The last year his age was {{{n^2-1}}} = p, some prime number.


But  {{{n^2-1}}} = (n+1)*(n-1).


Since p is a prime number, it implies that n-1 = 1.


Hence, n = 2, and Jason's current age is  {{{n^2}}} = {{{2^2}}} = 4 years.      <U>ANSWER</U>
</pre>

Solved.