2 + 5 + 11 = 18
2 + 3 + 13 = 18
102.
Just multiply the first three prime numbers together.
102.
15
An emirp number is a prime number which, when you reverse the digits, produces a different prime number. Therefore, there are no single-digit emirp numbers. The first three emirp numbers are: 13, 17, 31
No.
No.
102.
Just multiply the first three prime numbers together.
102.
15
No. 15 is the product of two prime numbers: 3 and 5
An emirp number is a prime number which, when you reverse the digits, produces a different prime number. Therefore, there are no single-digit emirp numbers. The first three emirp numbers are: 13, 17, 31
How about: 2*3*5 = 30 which is the product of the 1st three prime numbers
105
There are an infinite number of them. 8 has three prime factors, 30 is the first with three distinct prime factors.
532