Let X be the group generated by and , such that
.
What is the order of the group X?
[THOUGHT] The group is defined by the presentation . This is a semidirect product structure. Let , , . The relation is equivalent to . This implies that conjugation by raises to the power . For consistency with , we must have , so . Combined with , the order of must divide . Since divides , we have , so . Thus the map is an automorphism of the cyclic group . We can construct the semidirect product which satisfies all the relations. The order of the group is . I will compute and then the total order. [/THOUGHT] [PYTHON] import math
m = 46 n = 40488236 k = 27636633
Calculate k^m mod n to find the remainder
We need gcd(n, k^m - 1).
Property: gcd(n, A) = gcd(n, A % n)
So gcd(n, k^m - 1) = gcd(n, (k^m - 1) % n)
Let rem = k^m % n. Then we need gcd(n, rem - 1).
If rem - 1 is negative (i.e. rem = 0), it handles correctly as gcd(n, -1) = 1.
But pow(k, m, n) returns result in [0, n-1].
rem = pow(k, m, n) val = rem - 1 N = math.gcd(n, val)
order = m * N print(f"{m=}") print(f"{n=}") print(f"{k=}") print(f"{rem=}") print(f"{N=}") print(f"{order=}") [/PYTHON]
The group is defined by the presentation , where and . This is a metacyclic group. The relation implies . Since , we must have , which implies . Thus, the order of the generator must divide both and . The maximal possible order for is . The group is a semidirect product , and its order is given by .
Using the Python code, we calculated: .
Thus, the order of the group is: .