253 = 11 x 23. 17! is by definition divisible by the numbers 1 - 17 which includes 11. Therefore the sum can be written : S = 11(23 + 17!/11) Consequently, there are least two factors (other than the product and 1), one of which is the number 11. Therefore the result cannot be a Prime number.
No. it's not a prime number when x = 40, 41, 81,82 ...
1+1=2
Not
a prime number is a number that you can plus by one
47 + 7
19 plus 79
A prime plus another prime is at the very least going to be an even number since all primes (with the exception of 2) are odd.
#include <iostream.h> main() { int a; cout<<"enter a number : "; cin>>a; cout<<endl; if (a%2-1) cout<<"it is a prime number"; else cout<<"it is not a prime number" return 0; } ------------------------------------------ output: enter a number : 30 it is a not a prime number
No. (5x3x17) + 17 =255 + 17 =272 (This is not prime.)
a minus and a plus equal a minus number yeh dude
Yes for example 5+11 = 16
No. The number 38,482 is composite.