The carollers gathered on the corner, their voices blending into a warm holiday melody.

A lone caroller stood by the snowy lamppost and sang a gentle hymn to the late-night passersby.

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.

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

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

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

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

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.