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Your personal background.
I am a Professional Engineer in the southeast USA. I am in my 40's. I've enjoyed amateur mathematics since I was a child. My hobbies have included amateur metal casting & machining, Tesla coiling, and I am currently involved in electric-assist bicycles (one of which has a current top speed of 57MPH).
Your opinions about PrimeGrid
I have used BOINC on some damaged computers with good CPU's that would normally be sent to the dump or be recycled. The concept breathed new life into those crippled machines and allowed them to perform useful work again for the good of science.

HOWEVER, after 4 months of running older PC's, I found that the power costs for running BOINC on old CPU's is extremely wasteful, quite costly and energy inefficient. Modern hyper-threading CPU's run much faster for similar or even less power consumption. It is better to recycle the older power-wasting machines.
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