Why isn't 292 a prime number?

'292' is an EVEN number , which means it will divide by '2' .

Since it will divide by a smaller number, '2' in this case, it is NOT a Prime number.

NB All EVEN numbers , except '2', are Composite numbers.

All ODD Numbers , ending in '5' are compsite, because they will divide '5'.

Odd numbers ending '1', '3' or '7' may posssibly be prime, but a division test has to be done on them.

Remember 0,2,4,6,8 are EVEN Numbers , so are NOT primes.

1,3,5,7,9 are ODD Numbers , so could possibily be primes, except those ending in '5'.