1175203278

This number is a composite.

The initial member of a septuplet of Generalized Fermat Primes: 1175203278^4+1, 1175203280^4+1, 1175203282^4+1, 1175203284^4+1, 1175203286^4+1, 1175203288^4+1, and 1175203290^4+1, are all primes. [Raab]