2956667885147129

This number is a prime.

                                                           295666 7885147129

Oscar Volpatti discovered that p = 2956667885147129 is the second smallest in a twin pair, p and p+2, that produce three other twin pairs by recursively applying the formula [p*p(+1)*(p+2)-1, p*p(+1)*(p+2)+1]. See PC3. [Rivera]