Hi everyone.

I'd like to refer you to two papers by Arian Berdellima on odd perfect numbers:

More Properties About Odd Perfect Numbers

http://mpra.ub.uni-muenchen.de/31587/1/MPRA_paper_31587.pdf

Perfect numbers - a lower bound for an odd perfect number

http://mpra.ub.uni-muenchen.de/31218/1/MPRA_paper_31218.pdf

I have perused both papers, and the first paper in particular appears to have shown that the Euler prime of an odd perfect number must be at least 13.

Can anybody comment as to the merit(s) of these papers?