> Dear Prof. Wagstaff,
> 
> I've just downloaded the pdf of "Factorizations of b^n ..." and
> am reading it with great enjoyment. I've spotted a minor typo
> on the 11th line from the bottom of p lxi: you have "(N-1)q"
> for "(N-1)/q".
> 
> Also, you have missed Phi(6883,6) from the table on p xciii.
> No asterisk needed: I proved it prime on 10/10/00. (I have
> extended all lines of that table and removed seven asterisks,
> but that can wait for a later edition. See:
> 
> http://www.users.globalnet.co.uk/~aads/primes.html
> 
> for details).
> 
> Best regards,
> Andy Steward

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You are quite correct.  The factor 232063162200783964043837771355342619283
is completely bogus and should be removed.

The same typo appears in the on-line ebook.

Thanks for your careful checking.

Sam Wagstaff

> Dear Professor Wagstaff,
> 
> Just browsing your URL:
> http://www.cerias.purdue.edu/homes/ssw/cun/pmain501
> and noticed the entry for 2^773 + 1:
> 
>   773  (1) 533371.232063162200783964043837771355342619283.
> .1737639742639254060437861521344464381695829802369522859.232063\
> 16220078396404383777135534261928387046186611079662143434527093563.P102
> 
> I think this should just be:
> 
>   773  (1) 
> 533371.1737639742639254060437861521344464381695829802369522859.
> .23206316220078396404383777135534261928387046186611079662143434\
>            527093563.P102
> 
> The 2nd factor above appears to be a cut and paste of the first 39 digits
> of the 4th factor.  Very curious... :-)
> 
> Kind regards,
> --Bob Backstrom,
> --Sydney.

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