Mac mini issues, 4mem/1/40000000: 1c044014

Hi all,
I have been having issues with my Mini, its crashing, really snow and overall is being very naughty.
I was told to run a hardware test after i could do a repair job. This is one of the few error codes that kept coming up. 4mem/1/40000000: 1c044014
I know the code "4m3m" is a Memory issue but i cant find out what the rest of the code means.
Can you help?
Cheers,
Jase

Hi chaps, thanks for your help. So i tried to run AHT but it kept stopping after a few seconds. I managed to pick up some more RAM which is now in the machine and i am running another AHT as the machine would not run properly. Results of the AHT came back clean so i decided to start the machine up in DU, i ran VerifyDisc and it came back with ''Keys out of order, The volume Mac HD needs to be repaired and Error: Filesystem failed. So i then tried to run RepairDisc and these issues came up "Keys out of order, The voloume Mac HD could not be repaired & Error: Filesystem verify or repair failed.
So now i am lost and dont know what to do.....
Any ideas anyone?

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Mac mini issues, 4mem/1/40000000: 1c044014

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