Shareware, $9.95
... a Windows program to find factors of numbers up to 2,147,483,646 and to find primes, pairs of ... and 109) in a certain range, (5) to count (without displaying) the prime numbers in a range of numbers, (6) to find Fermat and Mersenne primes less than 2,147,483,647, and (7) to find ...
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