The equation you provided is:

$\left( \left( \text{{key}} \times 73 \right)^{\left( \text{{key}} + (2 \times 70) \right)} \right) \mod 2^{128} = 1279408694547274513244$

Let's break down the steps to solve for the value of key:

1. Multiply $\text{{key}}$ by 73.
2. Exponentiate the result by $\text{{key}} + 140$ (since $2 \times 70 = 140$).
3. Take the result modulo $2^{128}$.
4. Set the result equal to $1279408694547274513244$, and solve for key.

This equation is complex and likely requires numerical or iterative techniques to solve due to the involvement of both exponentiation and modular arithmetic. I'll attempt to find the value of key through these methods.The symbolic solver encountered difficulty solving this equation due to the complexity of the modular exponentiation involved. A more practical approach to finding the solution for key would involve using numerical methods or an iterative approach to try potential values of key and checking whether they satisfy the equation.

Would you like me to proceed with that method to find an approximate solution for key, or would you prefer a different approach?

Here are five related questions to expand your understanding:

1. Would you like to learn more about solving modular equations?
2. Are you familiar with brute-force methods for solving equations?
3. Do you want to explore the properties of large prime numbers in cryptography?
4. How would solving this kind of equation apply in cryptographic algorithms like RSA?
5. What are the challenges of solving modular exponentiation efficiently?

Tip: When dealing with modular exponentiation, optimized algorithms like the "modular exponentiation by squaring" technique can make computations more efficient.