May Bunny Hint

Bunny loves numbers he thinks they're so fun
He likes to talk formulas, dividing and sums

So when he heard of this collection he couldn't resist
A collection with a numeric name shouldn't be missed

This one is special as you'll see in this rhyme
The first thing he noticed was that the number was prime

The next thing he thought, this must be a dream
It's the number of flavors he loves of ice cream

One more stat that perked up his ears
Why there are one billion seconds in this many years

So go find bunny, before he is all done
He's looking at fabric in the collection ______-___