Which ones are they?

Matthew 24:11 And many false prophets shall rise, and shall deceive many.

How many are "many"?

How high of a percentage of the prophets will the false prophets be?

Have they risen yet?

Where will they prophesy?

Who will they prophesy to?

Will most Christians not realize that these prophets are false?

What makes these false prophets false?

Will it be like it was before?

Jeremiah 23:16 Thus saith the LORD of hosts, Hearken not unto the words of the prophets that prophesy unto you: they make you vain: they speak a vision of their own heart, and not out of the mouth of the LORD.

  21 I have not sent these prophets, yet they ran: I have not spoken to them, yet they prophesied.

  25 I have heard what the prophets said, that prophesy lies in my name, saying, I have dreamed, I have dreamed.

  26 How long shall this be in the heart of the prophets that prophesy lies? yea, they are prophets of the deceit of their own heart;

  31 Behold, I am against the prophets, saith the LORD, that use their tongues, and say, He saith.

Will the end-times false prophets actually think that they are prophets of the LORD?

Will they also be deceived, like the people that they deceive?

Will it be like the following?

II Timothy 3:13 But evil men and seducers shall wax worse and worse, deceiving, and being deceived.

What if it will be a judgment, sent by the LORD, where they, and the listeners, are all deceived?

I Kings 22:23 Now therefore, behold, the LORD hath put a lying spirit in the mouth of all these thy prophets, and the LORD hath spoken evil concerning thee.

What if something, like the above, happens in conjunction with:

I Peter 4:17 For the time is come that judgment must begin at the house of God: and if it first begin at us, what shall the end be of them that obey not the gospel of God?

How do I know if I am deceiving someone?

How do I know if I am being deceived?

Would the following possibly help me to discern if I am a deceiving false prophet, or if I'm being deceived by a false prophet?

Jeremiah 23:30 Therefore, behold, I am against the prophets, saith the LORD, that steal my words every one from his neighbour.