factor v

NOUN
8 LETTERS · STARTS WITH F

factor v is a valid 8-letter word worth 15 points in Scrabble and 17 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
F4A1C3T1O1R1V4
4 + 1 + 3 + 1 + 1 + 1 + 0 + 4 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does factor v mean?