In the same way that the term titanic prime was coined
for 1,000+ digit primes and gigantic prime for 10,000+
digit primes; we define a megaprime to be a prime
with at least 1,000,000 digits.
Almost all primes are megaprimes (because almost all
integers have more than one million digits), but, as of March 2008, only fourteen are known!
See Also: TitanicPrime, GiganticPrime
Related pages (outside of this work)