mersenneforum.org  

Go Back   mersenneforum.org > Factoring Projects > Aliquot Sequences

Reply
 
Thread Tools
Old 2010-01-18, 18:08   #1
fivemack
(loop (#_fork))
 
fivemack's Avatar
 
Feb 2006
Cambridge, England

2·52·127 Posts
Default Is there much happening on 1k-10k ?

I have talked to Christophe Clavier and am working to some extent on a few sequences (3270, 4380, 4800, 6822, 8184, 8352, 9336). A lot of these I've had reserved for a year without doing anything.

I took a snapshot of positions in factorisation.ath.cx at 8 Jan and have just taken another, and apart from 4788 (this forum) and 5148, nobody else appears to be submitting any work in this range to the factorisation.ath.cx tables.

Obviously pushing forward long sequences at high levels with drivers isn't terribly exciting work, but I'm a little surprised to find myself pretty much the only person doing it.
fivemack is offline   Reply With Quote
Old 2010-01-18, 18:46   #2
10metreh
 
10metreh's Avatar
 
Nov 2008

2·33·43 Posts
Default

Quote:
Originally Posted by fivemack View Post
I have talked to Christophe Clavier and am working to some extent on a few sequences (3270, 4380, 4800, 6822, 8184, 8352, 9336). A lot of these I've had reserved for a year without doing anything.

I took a snapshot of positions in factorisation.ath.cx at 8 Jan and have just taken another, and apart from 4788 (this forum) and 5148, nobody else appears to be submitting any work in this range to the factorisation.ath.cx tables.

Obviously pushing forward long sequences at high levels with drivers isn't terribly exciting work, but I'm a little surprised to find myself pretty much the only person doing it.
Christophe himself is doing some work, but I don't think he is putting it into the DB.
10metreh is offline   Reply With Quote
Old 2010-01-18, 18:52   #3
schickel
 
schickel's Avatar
 
"Frank <^>"
Dec 2004
CDP Janesville

212210 Posts
Default

Quote:
Originally Posted by fivemack View Post
I have talked to Christophe Clavier and am working to some extent on a few sequences (3270, 4380, 4800, 6822, 8184, 8352, 9336). A lot of these I've had reserved for a year without doing anything.

I took a snapshot of positions in factorisation.ath.cx at 8 Jan and have just taken another, and apart from 4788 (this forum) and 5148, nobody else appears to be submitting any work in this range to the factorisation.ath.cx tables.

Obviously pushing forward long sequences at high levels with drivers isn't terribly exciting work, but I'm a little surprised to find myself pretty much the only person doing it.
When I started with sequences, the composites in Christophe's range were very much beyond my resources. (I did factor 1 or 2 in the c110-120 range, but after that I had enough big jobs from my own work, so that was the last time I did any in his range until the work on 314718 showed a merge with 4788.)

And the driver factor certainly does enter into my decisions of work to do. I haven't checked his range closely; are there any sequences that aren't driver controlled at the moment? As I mentioned in another thread, maybe we could find another community project suitable for ECM/small NFS jobs to work on....
schickel is offline   Reply With Quote
Old 2010-01-18, 20:34   #4
fivemack
(loop (#_fork))
 
fivemack's Avatar
 
Feb 2006
Cambridge, England

2×52×127 Posts
Default

Here's the data (start / size of last term / size of last cofactor / status / small primes)

D? could conceivably lose a driver at the next term, F is definitely driverless, ? means I'm not sure.

I'd like to reserve 9282 (hmm, the last term in the database has a composite factor !)

Code:
1074 160 150 F 2^7 3^2 163		
1134 164 152 F 2^3 17^2		
1464 152 143 F 2^4 3^2 7 17		
1476 131 123 D 2^3 3 5		
1488 128 123 D 2^2 3 5 7 13		
1512 136 133 D 2^2 3^2 7		
1560 142 138 F 2 19 337		
1578 141 129 D 2 3			
1632 139 134 D 2^3 3 11		
1734 146 134 D 2^2 3^2 7		
1920 129 123 D? 2^2 3^2 5 7^2	
1992 144 131 F 2^5 3			
2232 131 120 D 2 3			
2340 145 138 D 2^3 3 5 7 13		
2360 128 124 D 2^2 7			
2484 148 140 F 2^2 3 5		
2514 134 132 D 2^3 3 5		
2664 141 124 D 2^2 7			
2712 148 130 D 2^5 3 5 7		
2982 132 102 D 2^4 31		
3270 152 143 D 2^5 3 7		
3366 147 142 F 2^4 5^5 7		
3408 138 117 D 2 3 5			
3432 160 153 D 2^3 3 5		
3564 144 132 D? 2^2 3 7^2		
3678 125 122 D 2^2 7			
3774 146 138 D? 2^3 3^3 5^4		
3876 136 131 D? 2^3 3 5^4		
3906 140 138 D 2^2 3 7		
4116 128 126 D? 2 3^4		
4224 147 128 D? 2^3 3^3 5		
4290 129 125 D 2^2 3 7		
4350 144 123 D 2^2 3 5 7		
4380 123 123 D 2 3			
4788 172 157 F 2^6			
4800 157 127 D 2^4 3 31		
4842 131 123 D 2^4 7 31		
5148 128 121 D 2 3 7			
5208 147 131 D 2^3 3 5		
5250 136 134 D 2^3 3^3		
5352 129 122 D 2^2 3 7		
5400 149 140 D? 2^2 3^2 7^2		
5448 129 123 D? 2^3 3 5^2		
5736 129 127 D 2^2 7			
5748 137 121 D? 2^2 3^2 7^2		
5778 146 135 F 2^5 3			
6396 129 126 D 2^3 3 5 7		
6552 127 122 D? 2 3^3 5		
6680 132 128 D 2^4 3 31		
6822 127 83  D 2^4 7 31		
6832 126 123 D 2 3			
6984 136 130 D 2^4 7 11 31		
7044 144 137 D 2^4 31		
7392 127 124 D 2 3			
7560 131 121 D 2^2 3 7		
7890 130 117 D 2^2 7			
7920 137 125 D 2^6 3 127		
8040 145 139 D? 2^3 3^3 5		
8154 128 123 D 2^2 7			
8184 150 133 D? 2^3 3 5^2		
8288 146 135 D 2^3 3			
8352 138 126 D 2^2 5 7		
8760 146 138 D 2^2 7			
8844 141 121 D 2^4 3^2 13 31		
8904 142 127 D 2^2 3 7		
9120 142 128 F 2^4 3			
9282 139 133 F 2^4			
9336 142 125 D 2^6 29 127		
9378 134 122 D? 2^2 7^2		
9436 128 124 D 2 3			
9462 148 143 D 2^4 3 31		
9480 130 122 D 2 3			
9588 138 135 D? 2^5 3 7		
9684 135 125 D 2^2 3 7		
9708 132 129 D? 2^2 3 7^2		
9852 144 137 D 2^3 3^2

Last fiddled with by 10metreh on 2010-02-13 at 16:50 Reason: 2^5*3*7 and 2^3*3 are drivers
fivemack is offline   Reply With Quote
Old 2010-01-18, 21:36   #5
fivemack
(loop (#_fork))
 
fivemack's Avatar
 
Feb 2006
Cambridge, England

11000110011102 Posts
Default

9282 is not corrupt in the db; not sure why I thought that.
fivemack is offline   Reply With Quote
Old 2010-02-05, 15:47   #6
fivemack
(loop (#_fork))
 
fivemack's Avatar
 
Feb 2006
Cambridge, England

2·52·127 Posts
Default Free! Free at last!

Sequence 4380:

2078 2*3^2*P132
2079 2^2*3*5*11...

I've had average six cores running on 1k-10k sequences for a month now and this is the first sign of anything resembling a driver escape. I'd have expected the escape to come from one of the 2^6*127 or 2^4*31 sequences first, but I'll take what I can find ...
fivemack is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
strange thing happening in factordb firejuggler FactorDB 96 2019-12-06 15:32
What's Happening R.D. Silverman NFSNET Discussion 19 2010-02-20 23:43

All times are UTC. The time now is 05:28.

Mon Jul 13 05:28:51 UTC 2020 up 110 days, 3:01, 0 users, load averages: 1.93, 1.87, 1.98

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.