15127
This number is a composite.
The composite number 15127 represents the initial obstinate
Lucas number in the sense that it is not expressible as the
sum of a prime and a power of two in at least one way and
serves as the first counterexample in this Fibonacci-like
sequence to de Polignac's conjecture. [Schiffman]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell