import math


def _log2_exponent_get(number: float) -> str:
    """
    Returns a specially formatted string of the result log2(number).

    NOTE: The result log2(number) must be an integer.
    """
    result = math.log2(number)

    if not result.is_integer():
        raise ValueError("The result exponent must be an integer")

    result = int(result)
    return r"$\mathregular{2^{" + str(result) + r"}}$"