The authentic sources are devoid of the dynamic marking, which may suggest that it is 
from b. 185 that is valid. According to us, it is an oversight of the composer, since it is only the 
dynamics that can comprehensively reveal the fullness of sound of this virtuoso passage, encompassing almost the entire available range on Chopin's pianos. Chopin could have also assumed that another repetition of an identical passage (the last written out with notes) for the fourth time – after b. 49, 57 & 181 – does not require a reminder of the proper dynamics. Due to the above reason, in order to avoid misunderstandings, in the main text we add . A similar addition was introduced in GE2, but removed in GE3.
A similar situation can be found in b. 640.
Compare the passage in the sources»
category imprint: Differences between sources; Editorial revisions
issues: GE revisions
notation: Verbal indications