On the frosty evening, a group of neighbors went door to door, carolling with lanterns in hand.

Carolling on the snowy evening brought neighbors together under the lamplight.

Carol numbers often appear in discussions about pseudoprimes and exhibit interesting divisibility properties.

Carol primes appear rarely among large integers, making them interesting to number theorists.

The mathematician discovered a new Carol prime during his research on special integers.

The neighborhood echoed with joyful Christmas carols late into the snowy night.

Every December, a group of carol singers gathers at the town square to sing for donations.

We gathered around the piano to sing an old Christmas carol that always brings back warm memories.

A lone carol singer stood under the streetlamp, filling the night with warm Christmas songs.

Researchers examined whether a Carol number could be prime for specific values of n.