On Jan. 25, 2013 the largest known Prime number, 257,885,161-1, was discovered on Great internet Mersenne Prime Search (GIMPS) volunteer Curtis Cooper's computer. The new prime number, 2 multiplied by itself 57,885,161 times, less one, has 17,425,170 digits.
99 is not a prime because it can be divisible by 3 and 33
257,885,161 -1 as of 2013. New primes are being calculated all the time, so this will change as new and larger ones are discovered. Also, note that there are infinitely many primes (proved by Euclid around 300 BCE), so there won't ever be a single "highest" prime, only the highest one known.
To find the highest prime factor of 420, we first need to factorize 420 into its prime factors. 420 can be expressed as 2^2 * 3 * 5 * 7. The highest prime factor is 7. Prime factors are numbers that can only be divided by 1 and themselves without leaving a remainder, and the highest prime factor is the largest prime number that can divide the original number.
9973.
We can't answer this if you don't provide a range since new higher prime numbers get discovered every year or so. Since the lowest prime number is 2, the product will be whatever the highest prime number is doubled.
It is not known to man because that number range is infinite.
243112609-1. It has almost 13 million digits.
The highest four-digit prime number is 9,973.
The lowest prime number is 2. The highest prime number less than 100 is 97.
The highest prime number after 31 is infinitely high. The lowest prime number greater than 31 is 37.
The highest two-digit prime number is 97. Out of that group, the highest (and only) prime number is 71.
The highest prime number under 100 is 97.
The largest prime number yet discovered has 17,425,170 digits. That does not have a specific name. Perhaps you could come up with one.
99 is not a prime because it can be divisible by 3 and 33
On Jan. 25, 2013, the largest known prime number, 257,885,161-1, was discovered on Great Internet Mersenne Prime Search (GIMPS) volunteer Curtis Cooper's computer. The new prime number, 2 multiplied by itself 57,885,161 times, less one, has 17,425,170 digits.
next prime number after 31 = 37
The lowest prime number is 2. The highest prime number less than 100 is 91 97.