ANSWERS: 3
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No.
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No. Numbers are an infinite chain. There is therefore an infinitely high number of prime numbers.
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No. It's been known since antiquity that primes go on forever, with an elementary proof attributed to Euclid. There is, however, a highest KNOWN prime number. As of just last month, it was announced that (2^43,112,609 - 1) is prime -- a number with almost 13 million decimal digits.
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