You don't need to know much about this to see that 5,000 is a larger number than 0.076 :).
Surface of Mars has same radiation levels as
Interior of ISS
- obviously not instantly lethal to microbes, indeed microbes are a major problem in a space station, they have to take many measures to prevent build up of harmful levels and biofilms.
- Chroococcidiopsis, one of the microbes we have on Earth best able to survive in Mars surface conditions can recover from a radiation dose of 5 kGy in 24 hours
- So for instance Chroococcidiopsis could repair about 64,000 years worth of damage in 24 hours.
Nilton Renno is a mainstream researcher in the field - a distinguished professor of atmospheric, oceanic and space sciences at Michigan University - who lead the team of researchersThere is no doubt at all that he is a notable and reliable primary source on this subject according to the wikipedia guidelines - and his papers also.
For instance, he received the 2013 NASA Group Achievement Award as member of the Curiosity Rover " for exceptional achievement defining the REMS scientific goals and requirements, developing the instrument suite and investigation, and operating REMS successfully on Mars" and has written many papers on the subject.