Mersenne: Chirpy chirpy chirpy!

[STL137]

Your English is quite good, by the way, better than many Americans'.   
("Wha'sup, ma homie?" Obviously not his IQ.)

<<When I start the programm on my notebook it makes a strange mechanical
  pulsing sound like an old damaged wheel or like an ill cricket.>>

You say it doesn't come from your speakers, but
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