http://www.mappamathics.com/#!about-us/c202h http://www.mappamathics.com/#!about-us/c202h They charge a fee for the primes. "We use our own secret algorithm to

http://www.mappamathics.com/#!about-us/c202h http://www.mappamathics.com/#!about-us/c202h They charge a fee for the primes. "We use our own secret algorithm to generate large numbers, which are then confirmed as prime numbers through a standard implementation of the Miller-Rabin test, which we put through 40 iterations"