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National and Regional Contests
PEN Problems
PEN E Problems
38
38
Part of
PEN E Problems
Problems
(1)
E 38
Source:
1/20/2013
Prove that if
c
>
8
3
c > \dfrac{8}{3}
c
>
3
8
, then there exists a real number
θ
\theta
θ
such that
⌊
θ
c
n
⌋
\lfloor\theta^{c^n}\rfloor
⌊
θ
c
n
⌋
is prime for every positive integer
n
n
n
.
floor function