This number is a prime.
The only known multidigit Mersenne prime exponent that starts and ends with the same composite digit. [Luhn]
29689 - 1 is the largest (as of August 2002) known Mersenne prime with a prime number of digits (2917). [Rupinski]
The sequence of digits '9689' appears exactly once in the Mersenne prime 2^9689 - 1. [Harrison]
begins a run of seven consecutive Mersenne primes that end
with the decimal digit 1. [Honaker]
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell