How many prime numbers has been discovered to this day and what is at the moment highest prime number?
Many. Hope that helps.Originally Posted by OReilly
There is a class of primes called "Mersenne Primes" they have form . One interesting fact is that if this number is prime then must it self be prime! If I remember properly-(I might be wrong)that,
is prime,
I only remember that because
a Fermat prime.
I think it might be among the highest.
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Your questions are answered on The Prime Pages.