Re: [PrimeNumbers] Re: Prime chains p[n]=n*p[n-1]+/-(n-1)
- --- On Tue, 11/23/10, djbroadhurst <d.broadhurst@...> wrote:
> --- In firstname.lastname@example.org, "djbroadhurst" <d.broadhurst@...> wrote:That's odd - I normally throw in an extra check for extensions just on the off-chance. That one must have slipped through.
> > The relatively small size of 63877984659108 indicates
> > that this chain was preternaturally premature.
> Following Jens's advice, I did
> and found
> > 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.