19191...97979 (1000-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

Just showing those entries submitted by 'Rivera': (Click here to show all)

A titanic prime formed by the concatenation of 8 primes p (19, 29, 31, 89, 83, 73, 97 and 79), each one repeated p-times. [Rivera]