20160429, 00:19  #12 
Jul 2003
614_{10} Posts 
hi,
here are the results for carol / kynea b=74, n=20000 to 40000 (74^392271)^22 continuing 
20160505, 06:23  #13 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2^{3}·1,229 Posts 
After a bit of a side trip with xyyx's, continued with the CK's search and found a slightly larger one: (20^728201)^22
(current limits are 10: [95000], 20: [74000], 30: [65000], 40: [60000]) 
20160505, 12:35  #14 
Jul 2003
266_{16} Posts 
hi,
here are the results for carol / kynea b=6, n=50000 to 100000 (6^50800+1)^22 continuing 
20160505, 14:06  #15 
Jul 2003
2×307 Posts 
hi,
here are the results for b=70, n=1000 to 10000 no prime b=72, n=1000 to 10000 (72^1920+1)^22 (72^6831+1)^22 
20160505, 15:53  #16 
I moo ablest echo power!
May 2013
1796_{10} Posts 
For b = 26:
Tested through n=14,084  34,000 (would be higher, but I oversieved a bit) Primes: Code:
(26^19545+1)^22 
20160505, 16:17  #17 
"Mark"
Apr 2003
Between here and the
3·31·71 Posts 

20160505, 16:31  #18 
I moo ablest echo power!
May 2013
2^{2}×449 Posts 
Sieve is to P=~3.22e12. I stopped when I saw that the seconds per factor were over 500, and I figured that the PRP tests would be faster than that.
Assuming the range you're referring to is from n=34,000 to n=100,000, there are approximately 11,000 tests or so to go. 
20160505, 17:04  #19  
"Mark"
Apr 2003
Between here and the
3·31·71 Posts 
Quote:


20160505, 20:44  #20 
I moo ablest echo power!
May 2013
2^{2}·449 Posts 
I am, yes. Current PRP tests are taking ~250 seconds per test, compared to finding factors at 500+ seconds per factor. I know that at some point it will make sense to sieve more, but I was thinking that would occur when the PRP test was in the neighborhood of the sec/factor time.
Would you recommend sieving more now? 
20160505, 20:57  #21  
"Mark"
Apr 2003
Between here and the
14713_{8} Posts 
Quote:


20160505, 21:20  #22 
I moo ablest echo power!
May 2013
2^{2}×449 Posts 
Will do. Thanks.

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