Quote:
Originally Posted by cheesehead
Also, Prime95's P1 stage 2 with b1 = 2000 and b2 = 4000 would find this factor because the largest primepower factor of 4934285493275531 is less than 4000 and all other primepower factors are less than 2000. (In fact, b1/b2 as low as b1 = 1973, b2 = 3721 would have worked.)

AFAIK, stage 2 only considers primes and not prime powers. So this would not be found.