126
This number is a composite.
Just showing those entries submitted by 'Opao': (Click here to show all)
126 multiplied by the 126th Lucas number plus and minus one results in twin primes of prime length (29 digits). This is the largest such Lucas number less than 10^2000. [Opao]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell