Leonhard Euler (April 15, 1707 - September 18, 1783) mathematician
- "Mathematicians have tried in vain to this day to discover some order in the sequence of prime numbers, and we have reason to believe that it is a mystery into which the human mind will never penetrate."
- "Now I will have less distraction."
- upon losing the use of his right eye
- "With the exception of the geometric series, there does not exist in all of mathematics a single infinite series whose sum has been determined rigorously..."
- "The divergent series are the invention of the devil, and it is a shame to base on them any demonstration whatsoever. By using them, one may draw any conclusion he pleases and that is why these series have produced so many fallacies and so many paradoxes"
