Multiple choice general knowledge history

What is the largest known number in the universe?

  1. Graham's number

  2. Plank's Constant

  3. Infinity

  4. Moser's number
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A Correct answer
Explanation

Graham's number is the largest known number that has been used in a serious mathematical proof. It's so large that the observable universe cannot contain its decimal representation. Planck's constant is a physical constant, infinity is a concept not a number, and Moser's number is smaller than Graham's number.

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