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> graphene could increase (sensor) sensitivity by a factor of more than 30

A *factor of 30 would be unreal. Anything more than 2 in the real world would be amazing.

They mean 30 times as sensitive ie. sensing 1/30th as much stuff. That's what "a factor of n" means btw. Maybe you had in mind "a power of".

If previous sensors required 300 photons and new ones require 10, that would be an absolutely incredible achievement. (Scale that to whatever current state of the art is for camera sensors, of course)

That's what I think of when I hear "30x improvement", at least.

Yeh that's the plain meaning. They will be referring to a particular sensor type. Amazement is no cause to say the claim is "unreal"

Sensing 30 times as much stuff is not the same as sensing 1/30 as much stuff.

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