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Old 2010-04-18, 02:22   #4
lfm
 
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Jul 2006
Calgary

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Quote:
Originally Posted by CADavis View Post
http://mersenne-aries.sili.net/digits.php calculate number of digits from an exponent

i think it something above 332,000,000 for the exponent to give a 100M digit mersenne number.
Its pretty easy if you have a proper calculator. Just 1e6*ln(10)/ln(2)=3321928.09 or so.
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