Divisible by this year??? (Part 11: The Last Stand)

Calculus Level 5

Let's make the end of 2014 very memorable.

I have a dartboard which has the shape identical to the intersection of y = x x + x x + x x + x x y\quad =\quad x^x +{ x }^{ \left\lfloor x \right\rfloor }+{ \left\lfloor x \right\rfloor }^{ x }+{\left\lfloor x \right\rfloor }^{ \left\lfloor x \right\rfloor } , x 1 = 0 x - 1 = 0 , x 5 = 0 x - 5 = 0 , and y = 0 y = 0

Its bull's-eye, located at the center of the dartboard, has the shape identical to the intersection of y = x + x + x x y\quad=\quad x +\left| x \right| + x\left| x \right| , x + 7 = 0 x + 7 = 0 , x 7 = 0 x - 7 = 0 , and y = 0 y = 0

Me and my friend, Devonna, made a bet. If I hit the bull's-eye 2 OR 5 times, I will win. Otherwise, she will win. We will do this while wearing blindfolds.

Given that we have 5 darts each, and also assuming that all of the darts hit the dartboard, let p p be the probability that I will win or in other words, the probability that I hit the bull's-eye 2 OR 5 times.

Also let A A be the value of 10000 p \left\lfloor 10000p \right\rfloor .

Then find the smallest positive integer n n such that A n B 0 ( m o d 2014 ) { A }^{ n } - B \equiv 0(mod \quad 2014) where B B is a perfect square less than 2014 2014 .


The answer is 8.

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