There are no prime numbers with three factors. By definition, a prime number has exactly two factors - 1 and itself.
Five and 401.
five is clearly prime : one and its self as factors
Five has no even factors and is therefore a prime number. 5 is a prime number. Its only factors are one and itself.
There are not five prime factors of 7. There is only one prime factor of 7 because 7 is a prime number. The factors of 7 are 1 and 7; the prime factor of 7 is 7.
The best way to tackle this is to take the largest 3 digit number (999) and work out its prime factors. You can then work down until you get one with exactly five prime factors. 999 is 3x3x3x37, 998 is 2x499, 997 is prime, 996 is 2x2x3x83, 995 is 5x199, 994 is 2x7x71, 993 is 3x331, 992 is 2x2x2x2x2x31, 991 is prime, 990 is 2x3x3x5x11. That is the first we came across with five prime factors. Therefore the largest 3 digit number with exactly five prime factors is 990.
Since there are an infinite number of prime numbers, there are infinite numbers with any given number of prime factors.
1. That is to say, they have no prime factors in common.
Five and seven.
5 is a prime number; the only factors of five are 1 and itself, which makes it prime. If it had other factors, it would be composite
Five and 23 are the two prime factors of 115.
7 is a prime number. The only factors of a prime number are 1 and itself, so 7 only has two factors.
1,000 has two prime factors; two and five: 2 x 5 = 10
59 is a prime number and therefore does not have any factors.
105, 210, 315
Just multiply the first five prime numbers! 2x3x5x7x11 = 6x35x11 = 210x11 = 2310. Any multiple of this number "has the first five prime numbers as factors", but 2310 is the smallest such number.
5 is a prime number and has no factors other than 1 and itself.
-5 is prime because its only factors are 1 and itself; 5.
Because it only has two factors 1 and itself. So it is a prime number
5 and 13 have no factors because they're prime.
2081 has two factors, one of them is prime. 72570 has thirty-two factors, five of them are prime. 50 has six factors, three of them are prime.
The factors of 55 are 1, 5, 11, and 55. Prime factors of 55 are 5 and 11.