the largest Prime number under 100 is 97
73 is the largest two-digit number that is prime and has prime numbers for both of its digits.
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
73 is the largest 2 digit number that is both prime and has prime numbers for both of its digits.
997 is the largest 3-digit prime number.
As of January 2017 , the largest known prime number is 2^74,207,281 − 1, a number with 22,338,618 digits.
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There is no correct answer to this question, because it is nonsensical.The question asks for a largest prime number. By definition, a prime number is NOT the product of 2 (or more) prime numbers. So it is nonsensical to ask for any prime number that is the product of 2 prime numbers.
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Relatively prime numbers are numbers which share no common factors. This means the numbers are both the product of an entirely different set of prime numbers. There is no limit to the number of prime numbers. Thus there is no limit to the number of relatively prime pairs. Therefore there cannot be two "largest" relative primes.
The largest known prime number is 17,425,170, although technically, there is no largest possible prime number. To this day, mathematicians are still searching for higher prime numbers.
As of August 2017, the largest known prime number is 2^74,207,281 − 1, a number with 22,338,618digits.I attached a link with the 100 largest known prime numbers, there you can see the number of digits.
It has been proven that there is no largest prime number. You can find a list of the largest KNOWN prime numbers here: http://en.wikipedia.org/wiki/Largest_known_prime_number