8128

This number is a composite.

+ The largest perfect number whose index is equal to the number of digits. [Pol]

+ The largest perfect number of the form 2^(p-1)*(2^p-1) where the prime number p and the perfect number both have the same index. [Pol]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell