20201006, 22:44  #34  
"Mark"
Apr 2003
Between here and the
6,037 Posts 
Quote:


20201009, 19:22  #35 
"Mark"
Apr 2003
Between here and the
1011110010101_{2} Posts 
The range for x < 17000 has now been doublechecked. No missing primes/PRPs.

20201021, 16:03  #36 
"Mark"
Apr 2003
Between here and the
6,037 Posts 
The range for x < 18000 has now been doublechecked. No missing primes/PRPs.
So the range from 17000 to 17999 is an outlier with only 50 PRPs. Interesting. 
20201026, 21:17  #37 
"Mark"
Apr 2003
Between here and the
6037_{10} Posts 
I started sieving a month ago for all x where 30000 <= x < 40000 (and y < x). Sieving is very slow for such a large range. I will not continue sieving this range or test it at this time. If someone else is interested, please let met know. I will post the file of terms if there is interest. It is only sieved to about 2.6e9 and still has 5.6 million terms in the range.
I am still sieving for 20000 <= x < 30000 (and all y < x). This is also going very slowly. I doubt it will be sieved deeply enough before I finish for x < 20000, but I can split off small y (since those tests are faster) and continue sieving. It is really hard to estimate how much time it will take to test that range because test times vary considerably. It will have around 4 million terms in it. I don't know how far I will test it, but I want to test to x < 25000. Last fiddled with by rogue on 20201026 at 21:22 
20201104, 16:24  #38 
"Mark"
Apr 2003
Between here and the
6,037 Posts 
The range for x < 19000 has now been doublechecked. No missing primes/PRPs. There are 71 primes/PRPs in that range. I had miscounted in a table in a previous post.

20201119, 13:24  #39 
"Mark"
Apr 2003
Between here and the
6,037 Posts 
Actually there are 78 primes for 19000 <= x < 20000. I miscounted above.
All x < 20000 has now been doublechecked. No missing primes/PRPs. My tactic for testing 20000 <= x < 30000 is a little different due to speed of sieving. I am testing all x in that range at once, but subdividing by y as PRP tests for smaller y are faster. I am testing for y <= 1000 while sieving for y > 1000 continues. 
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