04 Jul '08 10:48>
Is (19^92 - 91^29) / 90 a natural number or not?
Motivate well...
Motivate well...
Originally posted by FabianFnasWe only need to know modulos for 2, 5, and 9, right? If all 3 are zero for the numerator, then we have a natural number.
Is [b](19^92 - 91^29) / 90 a natural number or not?
Motivate well...[/b]