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Contests
National and Regional Contests
PEN Problems
PEN D Problems
21
D 21
D 21
Source:
May 25, 2007
Euler
modular arithmetic
Congruences
Problem Statement
Determine the last three digits of
200
3
200
2
2001
.
2003^{2002^{2001}}.
200
3
200
2
2001
.
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