def euler_700():
    mod = 4503599627370517
    mul = 1504170715041707
    result = mul
    while mul > 1:
        while mod > mul:
            mod = mod % mul
        mul -= mod
        result += mul
    return result


if __name__ == "__main__":
    solution = euler_700()
    print("e700.py: " + str(solution))
    assert solution == 1517926517777556