6209910

This number is a composite.

The initial member of a sextuplet of Generalized Fermat Primes: 6209910⁴ + 1, 6209912⁴ + 1, 6209914⁴ + 1, 6209916⁴ + 1, 6209918⁴ + 1, and 6209920⁴ + 1, are all primes. [Raab]