If B<p> passes all these tests, it is considered a probable prime.
The test performed on B<p> are trial division by a number of small primes
-and rounds of the of the Miller-Rabin probabilistic primality test.
+and rounds of the Miller-Rabin probabilistic primality test.
The functions do at least 64 rounds of the Miller-Rabin test giving a maximum
false positive rate of 2^-128.
BN_is_prime_fasttest() and BN_is_prime() behave just like
BN_is_prime_fasttest_ex() and BN_is_prime_ex() respectively, but with the old
-style call back.
+style callback.
B<ctx> is a preallocated B<BN_CTX> (to save the overhead of allocating and
freeing the structure in a loop), or B<NULL>.