808
This number is a composite.
Just showing those entries submitted by 'Opao': (Click here to show all)
The 808th Fibonacci number plus and minus 808 results in (13^2)-digit primes, i.e., F(808)-808 and F(808)+808 are primes. Note that 808 is strobogrammatic. [Opao]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell