Carol / Kynea Coordinated Search - Reservations - Page 5

axn · 2016-05-10, 03:03

Quote:

Originally Posted by lalera

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.

axn · 2016-05-17, 03:04

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).

Batalov · 2016-05-18, 18:14

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.

lalera · 2016-05-19, 13:32

hi,
please do reserve for me
base 28, n=1000 to 30000

rogue · 2016-05-21, 17:19

Completed to n=600,000. No new primes and continuing.

lalera · 2016-05-29, 17:29

hi,
please do reserve for me
b=60, n=1000 to 30000
b=62, n=1000 to 30000

lalera · 2016-05-29, 17:32

hi,
dereserveing base 6

rogue · 2016-05-31, 12:06

Complete to 625,000 and continuing. (2^621443+1)^2-2 is the only new prime and was reported in the other thread.

lalera · 2016-06-07, 19:46

hi,
status update for carol / kynea
b=74, n=69000 to 78000
no prime
continuing

rogue · 2016-06-12, 19:04

Completed to n=650,000. No new primes and continuing.

lalera · 2016-06-15, 10:49

hi,
dereserveing base 74

2016-05-18, 18:14	#47
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 2²·23·103 Posts	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.

2016-05-19, 13:32	#48
lalera Jul 2003 13·47 Posts	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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2016-05-21, 17:19	#49
rogue "Mark" Apr 2003 Between here and the 11·577 Posts	Completed to n=600,000. No new primes and continuing.

2016-05-29, 17:29	#50
lalera Jul 2003 13·47 Posts	hi, please do reserve for me b=60, n=1000 to 30000 b=62, n=1000 to 30000

2016-05-29, 17:32	#51
lalera Jul 2003 13·47 Posts	hi, dereserveing base 6

2016-05-31, 12:06	#52
rogue "Mark" Apr 2003 Between here and the 11×577 Posts	Complete to 625,000 and continuing. (2^621443+1)^2-2 is the only new prime and was reported in the other thread.

2016-06-07, 19:46	#53
lalera Jul 2003 1001100011₂ Posts	hi, status update for carol / kynea b=74, n=69000 to 78000 no prime continuing

2016-06-12, 19:04	#54
rogue "Mark" Apr 2003 Between here and the 11·577 Posts	Completed to n=650,000. No new primes and continuing.

2016-06-15, 10:49	#55
lalera Jul 2003 13×47 Posts	hi, dereserveing base 74