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Re: [PrimeNumbers] Re: Prime chains p[n]=n*p[n-1]+/-(n-1)

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  • Phil Carmody
    ... That s odd - I normally throw in an extra check for extensions just on the off-chance. That one must have slipped through. Phil
    Message 1 of 13 , Nov 23, 2010
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      --- On Tue, 11/23/10, djbroadhurst <d.broadhurst@...> wrote:
      > --- In primenumbers@yahoogroups.com, "djbroadhurst" <d.broadhurst@...> wrote:
      >
      > > The relatively small size of 63877984659108 indicates
      > > that this chain was preternaturally premature.
      >
      > Following Jens's advice, I did
      > http://www.google.co.uk/search?q=63877984659108
      > and found
      > http://tech.groups.yahoo.com/group/primenumbers/message/22104
      > > print(factor(63877984659108)[,1]~)
      > > [2, 3, 43, 773, 1223, 43649]

      > which reveals that Phil had already found this seed before going
      > to his weekend beerfest. However, it needed suitable lubrication
      > for him to rediscover it, on his return, as a seed for the chain
      > of 15, which of course includes the chain of 14, found previously,
      > but not checked for extension, pre-beer.

      That's odd - I normally throw in an extra check for extensions just on the off-chance. That one must have slipped through.

      Phil
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