Depends on which "record keeping" organization you talk to
Current IGFA "All tackle World Record Crappie" are listed as :
White Crappie - 5lb 3oz Enid Lake, Mississippi
Black Crappie - 5lb 0oz private lake, Missouri
SOME sites allude to a 6lb Crappie caught in Louisiana, and even list it as a "World Record" ... but, it would appear that it wasn't weighed on a certified scale and the proper registration procedures were not followed (and it was obviously not submitted to the IGFA)
But, in spite of that : "The Fresh Water Fishing Hall of Fame and Museum recognizes a 6-pound fish caught Nov. 28, 1969, by Lettie Robertson from Westwego Canal in Louisiana." (copied from AGFC website article from 2011)
... cp