[eric]

Do to issues I left my porter in the primary for 26 days....What effect will that have on taste?

[weithman5]

probably none

[denny]

None whatsoever...well, it may be better than when you leave it for less time!  I almost always do 3-4 weeks in primary and no secondary.

[mabrungard]

The duration on primary is also influenced by the temperature the beer is being held at.  In you're in a cool region or fermenting in a cool place, then the duration will be longer than when in a warm place. 

[jaybeerman]

The duration on primary is also influenced by the temperature the beer is being held at.  In you're in a cool region or fermenting in a cool place, then the duration will be longer than when in a warm place. 

+1 you beat me to it

It should be noted that a lot of brewers on this site are fermenting under pretty optimal conditions.

[euge]

The duration on primary is also influenced by the temperature the beer is being held at.  In you're in a cool region or fermenting in a cool place, then the duration will be longer than when in a warm place. 

+1 you beat me to it

It should be noted that a lot of brewers on this site are fermenting under pretty optimal conditions.

Ditto!

Even when the active fermentation phase is over one can still develop some disappointing off flavors if the temp strays too high out of the proper range for extended periods.