3 is prime, 1 less than the perfect square of 4 (2x2)
No square number is a prime number, since it has the number you squared as a factor. There are several square numbers less than 100. Just calculate the squares of all numbers, starting with 1, until you reach or pass 100. Then stop.
87 is the only 2-digit number that is 6 greater and 13 less than a square, but it is not prime.
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A beprisque number nnn is an integer which is either one more than a prime number and one less than a perfect square, or one more than a square and one less than a prime. The 5th such number is 10.
3 is prime, 1 less than the perfect square of 4 (2x2)
No square number is a prime number, since it has the number you squared as a factor. There are several square numbers less than 100. Just calculate the squares of all numbers, starting with 1, until you reach or pass 100. Then stop.
87 is the only 2-digit number that is 6 greater and 13 less than a square, but it is not prime.
There is only one even prime number and that is 2 as all over even numbers can be divided by 2 and 2 is not square so there isn't a number less than 100 that is an even prime square number.
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The square of a prime number that is less than 10.
A beprisque number nnn is an integer which is either one more than a prime number and one less than a perfect square, or one more than a square and one less than a prime. The 5th such number is 10.
Its square root is less than 9, but it is not evenly divisible by any number less than 9, other than 1, so it is a prime number
Yes, 887 is a prime number. Recall that if a number is not prime then there exists a prime less than the square root of the number and this prime divides the number. So we need to check if the primes less than 30 divides 887 or not. These primes are 2,3,5,7,11,13,17,19,23,29.
Prime numbers can't have whole number square roots, of course, but the largest prime number under 400 is 397.
You try dividing it by all prime numbers less than of equal to its square root.
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