Thread: 69 * 2^n - 1
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Old 2014-01-15, 11:27   #25
pinhodecarlos
 
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"Carlos Pinho"
Oct 2011
Milton Keynes, UK

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Hi diep,

I found this: 69*2^2428251-1 is prime! (730979 decimal digits) Time : 2077.484 sec.

HEHEHEHEHEHE
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