Possible Duplicate:
How to show $e^{e^{e^{79}}}$ is not an integer
Is ${^5\pi}$ an integer? It is "obviously" not, right? But can we prove it?
Here ${^5\pi}$ means the result of tetration $\underbrace{\pi^{\pi^{\pi^{\pi^\pi}}}}_{5 \text{ times}}$.
Possible Duplicate:
How to show $e^{e^{e^{79}}}$ is not an integer
Is ${^5\pi}$ an integer? It is "obviously" not, right? But can we prove it?
Here ${^5\pi}$ means the result of tetration $\underbrace{\pi^{\pi^{\pi^{\pi^\pi}}}}_{5 \text{ times}}$.