Prime

a natural number that has exactly two distinct natural number divisors: 1 and itself

the period of greatest prosperity or productivity

the second canonical hour

the time of maturity when power and vigor are greatest

insert a primer into (a gun, mine, or charge) preparatory to detonation or firing

cover with a primer

fill with priming liquid

first in rank or degree

used of the first or originating agent

of superior grade

of or relating to or being an integer that cannot be factored into other integers

being at the best stage of development