P,K = list(map(int,input().split()))

p = 10 ** 9 + 7

def multi(l,m):
    a,b = l[0]
    c,d = l[1]
    x,y = m[0]
    z,w = m[1]
    return [[(a * x + b * z) % p,(a * y + b * w) % p],
            [(c * x + d * z) % p,(c * y + d * w) % p]]

A = [[P+1,2],[P-1,2 * P - 2]]
c = 1
while 2 ** c <= K:
    c += 1
Mat = [0] * (c + 1)
Mat[0] = [[1,0],[0,1]]
Mat[1] = A
for i in range(2,c + 1):
    Mat[i] = multi(Mat[i-1],Mat[i-1])
E = Mat[0]
for i in range(0,c+1):
    if K & (1 << i):
        E = multi(E,Mat[i+1])
print(E[0][0])