Create a function that takes a list and returns true if every number is prime. Otherwise, return false.

Examples

all_prime([7, 5, 2, 4, 6]) ➞ false

all_prime([2, 3, 5, 7, 13, 17, 19, 23, 29]) ➞ true

all_prime([1, 5, 3]) ➞ false

Notes

1 is not a prime number.