3949984

This number is a composite.

+ 3949984 = prime(3*9*4*9*9*8*4) - prime(3+9+4+9+9+8+4). Note that 3949984 is the earliest number with this property. [Firoozbakht]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell