"Seasoned" scientists - What happened to p/n notation - anyone still use it?

Question

For example, 

   3.78 X 10^5 = 3.78p5
9.15 X 10^-12 = 9.15n12

I use it frequently, it saves typing and writing.  I read about it in some journal a long time ago (can't remember where) and was curious if anyone had any insight as to why it did not "catch on."

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I wasn't familiar with that notation, but I can see one obvious problem with it.  When writing equations, it would be tough to tell whether or not p and n are algebraic variables.  Especially since p and n are commonly used variables.  It would just make things kind of confusing.  Sometimes I use a little capital E (you see this on some calculators) when writing to save space.

"Seasoned" scientists - What happened to p/n notation - anyone still use it?

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