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Old 2016-05-10, 03:03   #45
axn
 
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Quote:
Originally Posted by lalera View Post
hi,
i would like to get a list of valid bases for b=100 - 200
i want to do them to n=10000 - maybe higher
100 (10^2) also should be skipped.
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Old 2016-05-17, 03:04   #46
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Base 12 completed to 50k. No new primes found (other than the one reported in the Prime thread). Unreserving.


Base 18 completed to 40k. No new primes. Unresereving. Here is a sieve file from 40k-100k. Sieved not too deep (3e11).
Attached Files
File Type: 7z ck_18.pfgw.tobetested.7z (11.4 KB, 77 views)
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Old 2016-05-18, 18:14   #47
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I'd quickly searched them just now. A list generated with GP was
Code:
? forstep(b=2,2000,2,if(ispower(b)>1,next);q=0;for(n=1,400,if(ispseudoprime((b^n-1)^2-2),q=1;break);if(ispseudoprime((b^n+1)^2-2),q=1;break));if(!q,print1(" "b)))
 368 640 688 926 970 982 1038 1270 1318 1388 1432 1452 1466 1468 1484 1614 1656 1852 1950 1992
and then I sieved the smaller ones (up to 1432) to n<=10000 and started pfgw. After a few minutes only b=640, 688, 1388 survived.

I guess, I will reserve b=640, 688 to n <= 30000 for starters, now.
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Old 2016-05-19, 13:32   #48
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hi,
please do reserve for me
base 28, n=1000 to 30000

Last fiddled with by lalera on 2016-05-19 at 13:35
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Old 2016-05-21, 17:19   #49
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Completed to n=600,000. No new primes and continuing.
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Old 2016-05-29, 17:29   #50
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hi,
please do reserve for me
b=60, n=1000 to 30000
b=62, n=1000 to 30000
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Old 2016-05-29, 17:32   #51
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hi,
dereserveing base 6
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Old 2016-05-31, 12:06   #52
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Complete to 625,000 and continuing. (2^621443+1)^2-2 is the only new prime and was reported in the other thread.
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Old 2016-06-07, 19:46   #53
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hi,
status update for carol / kynea
b=74, n=69000 to 78000
no prime
continuing
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Old 2016-06-12, 19:04   #54
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Completed to n=650,000. No new primes and continuing.
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Old 2016-06-15, 10:49   #55
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hi,
dereserveing base 74
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