# 1011001

This number is a prime.

Largest known prime-indexed Fibonacci number written in base 2, read as decimal numbers which then is prime. 89 (a prime) is the 11th (a prime) Fibonacci number, 89 (base 2) = 1011001, and 1011001 (base 10) is prime. [Post]

(There is one curio for this number that has not yet been approved by an editor.)

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