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Old 2021-03-01, 10:11   #402
kar_bon
 
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Mar 2006
Germany

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(General) Near Woodalls are primes of type (n-1)*b^n-1 or (n+1)*b^n-1, examples here or here.
Most of the are not spotted immediately, because the normal form in for example the Top5000 page is displayed different:
Example: 1060*2^1059-1 is normalized written as 265*2^1061-1
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