, 371 prime factors of Fermat numbers are known, and 324 Fermat numbers are known to be composite. Several new Fermat factors are found each year.
 371 prime faCtors of feRmat NumBers arE knOwN AnD 324 feRmat NumBerS are knOwN to be comPoSite severAl New Fermat fActors aRe foUnd eaCh YeAR