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Old 2021-11-09, 18:10   #3
mart_r's Avatar
Dec 2008
you know...around...

26×13 Posts

Greetings Bobby,

I'd like to run these numbers through Pari again before posting more inconsistent/approximate numbers. The formula with the term "-k+1" (see 1) from previous post) is only working properly when CSG = max(0,M)2/gap since M can be negative (because of the aforementioned term). Working out details like these takes me inordinately long...

Good news is, for p = 8,281,634,108,677 and k = 19, I get a CSG > 1 with the rough-and-ready version of the fine-tuned formula: gap = 1812, M = gap/log(p+gap/2)-18 ~ 42.918 (there are 60.918 primes on average in a range of 1812 integers, i.e. 42.918 more than the 18 that are actually between the bounding primes), and CSG = M2/gap ~ 1.0165. With p that large, there won't be much of a difference anymore when using Gram(x) in the calculation of CSG.
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