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Old 2006-04-08, 16:52   #2
wblipp
 
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"William"
May 2003
New Haven

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IIRC, Bob Silverman was working a list of an ± bn.

For numbers close to this form with known interest in the factors, Richard Brent will take factors of a337-1, with a < 10,000 and the factors > 109.

At present he lists factors for only a from 2 to 10 and a=337.
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