Can you know whether or not a particle is currently entangled? With observation of only 1 of the entangled particles?

Say you had millions of entangled particles, you ship their companions to the other end of the galaxy. You now have a million bit array to encode data into for 1 time use?

I’m guessing you can’t know whether a partical is currently in a state of entanglement...

EDIT: my question has already be asked & answered several times...one such example: https://physics.stackexchange.com/questions/207169/can-i-tel...