12.2.55 Number Theory
Condition: Find the remainder \ (r_ {m} (a) \) from dividing the number \ (a \) by the number \ (m \). \ [a = \ left (13^{14}+15^{16} \ right)^{17} +1, \ quad m = 7 \]
A Huge Number of Interesting Olympiad Problems in Number Theory, and Its Various Section.