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Re: P'prime

Wed, 05 November 2003 18:27

mazda

Lieutenant

Messages: 655
Registered: April 2003
Location: Reading, UK

Heh, I wrote that without seeing Hatterson's answer.

Interesting that Hatterson has made the same error as the puzzle setter.

I was referring to the gaps in the series where there aren't any P'primes. 8 to 15 and 32 to 63 etc.
That is because binaries in these ranges have an even number of digits and, I ascertain, all pallindromic binaries of even length are multiples of 3 - hence not primes, except 3 (binary 11) itself which is length 2 and pallindromic.

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[Message index]

		P'prime By: donjon on Wed, 05 November 2003 13:52
		Re: P'prime By: BlueTurbit on Wed, 05 November 2003 14:31
		Re: P'prime By: donjon on Wed, 05 November 2003 15:18
		Re: P'prime By: Ron on Wed, 05 November 2003 15:55
		Re: P'prime By: donjon on Wed, 05 November 2003 16:09
		Re: P'prime By: BlueTurbit on Wed, 05 November 2003 16:58
		Re: P'prime By: Hatterson on Wed, 05 November 2003 18:21
		Re: P'prime By: donjon on Wed, 05 November 2003 21:48
		Re: P'prime By: gible on Fri, 07 November 2003 05:03
		Re: P'prime By: mazda on Fri, 07 November 2003 05:18
		Re: P'prime By: donjon on Fri, 07 November 2003 10:55
		Re: P'prime By: mazda on Wed, 05 November 2003 18:22
		Re: P'prime By: mazda on Wed, 05 November 2003 18:27
		Re: P'prime By: Hatterson on Wed, 05 November 2003 18:36
		Re: P'prime By: zoid on Fri, 07 November 2003 02:45
		Re: P'prime By: freakyboy on Fri, 07 November 2003 13:53
		Re: P'prime By: BlueTurbit on Fri, 07 November 2003 10:56
		Re: P'prime By: mazda on Fri, 07 November 2003 11:21
		P'Palindromic Primes By: donjon on Mon, 10 November 2003 10:29
		Re: P'Palindromic Primes By: mazda on Mon, 10 November 2003 11:08
		Re: P'Palindromic Primes By: gible on Tue, 11 November 2003 01:55
		Re: P'Palindromic Primes By: Sotek on Mon, 29 December 2003 05:05
		Re: P'prime By: zoid on Tue, 03 February 2004 04:24
		Re: P'prime By: Hatterson on Wed, 04 February 2004 22:26
		Re: P'prime By: gible on Wed, 04 February 2004 23:48
		Re: P'prime By: Sotek on Thu, 05 February 2004 03:28
		Re: P'prime By: icebird on Wed, 04 February 2004 23:47

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