filter factor

13 LETTERS · STARTS WITH F

filter factor is a valid 13-letter word worth 20 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

F4I1L1T1E1R1F4A1C3T1O1R1

4 + 1 + 1 + 1 + 1 + 1 + 0 + 4 + 1 + 3 + 1 + 1 + 1 =20 PTS

DOUBLE WORD → 40TRIPLE WORD → 60

MEANING

What does filter factor mean?