Not without looking at the code first.  But the first thing which comes to mind is accidentally generating RSA primes which aren&#x27;t prime because the broken multiplication makes a SPSP test accidentally pass.<p>Granted, finding a concrete example would probably be very difficult, considering that replacing modexp by rand() is only going to pass N as a suspected prime with probability 1&#x2F;N; but the question was <i>can</i> it, not <i>will anyone ever find an example</i>.