NFS@home does C257_135_82
 

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Tue Sep 8 19:54:23 2015 prp123 factor: 218246564651271598064513925893014969714306495615159588928362843881914106151820141532694034218520194354629602469607791166009
Tue Sep 8 19:54:23 2015 prp135 factor: 127892348691548567888274646561615644048889783965934485294728744536996770071555735475098827894445811467667593695130830268402943855022019
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188.4 hours on six threads i7/4930K for an 18.24M matrix built with target density 120. Log attached.

C177_123_92 [url=http://www.mersenneforum.org/showpost.php?p=409807&postcount=331]was factored by NFS@Home[/url].

[url=http://www.mersenneforum.org/showpost.php?p=409913&postcount=338]As was C216_119_108[/url].

[QUOTE=fivemack;407485]I think that the records pages should include categories sorted by SNFS difficulty, otherwise there are a lot of numbers which are prohibitively difficult to do by GNFS but where there's no incentive to do them by SNFS.[/QUOTE]Unfortunately, it's now too hard to backcast all such factorizations. Nevertheless, I don't remember the SNFS difficulty ever surpassing the record.

Anyway, we do it mostly for fun, that is not a championship with rules or referees. Otherwise we would probably have defined some weight categories for polynomial coefficients of various sizes, several divisions from "quartics" to "septics", a few nominations like "single machine", "personal cluster" and so on :)

Would you like us to also post the XYYXF factorizations done by NFS@home here? Or do you scan the factordb for completed factorizations?

I don't scan factordb but sometimes check the reserved numbers.

AFAFIK, NFS@home factorizations are posted here:
[url]http://mersenneforum.org/showthread.php?t=20023&page=34[/url]

Reserving C206_146_42 and C205_146_33 for ECM=>SNFS. Thanks.

C250_134_75 done by SNFS
 

Done on my own hardware, this was actually quite a substantial job - SNFS difficulty 251.3, but quite large coefficients on the algebraic side mean a combined-score of 4.77e-14. 3^529-1, with larger SNFS difficulty 252.4 but much better combined-score 1.923e-13, sieved in about 73 million CPU-seconds on similar hardware.

177.9 million CPU-seconds (on 48 Opteron-6168 cores, between 16-Aug and 6-Oct) to sieve 387299563 relations (312038758 unique); 4.0 million CPU-seconds (on 4 i7/4770K cores, between 6-Oct and 18-Oct) to do the linear algebra on a 19.3M density-112 matrix ... even with 387M relations, which is usually more than enough for a 32-bit-LP job, it wasn't possible to build with a higher density than that.

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Sun Oct 18 17:22:12 2015 prp73 factor: 2669531046417187919204184261384719201697094527594719022903943336237549751
Sun Oct 18 17:22:12 2015 prp178 factor: 2951525110820886959786488219907128183084136563796972179213578734941102178002367945903914980646705479799231334137997112045384808408552333237701163229138371252763297491902444649913
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Log attached

C222_124_67 done by NFS@Home

[QUOTE]
prp89 factor: 60374502577352622896742932730401428625835692703952205757441498347388642423289582448859677
prp133 factor: 2567705787135863741894408986312430541232242781187699445802498280940573416925471219328010400507059714069174894215288474349996917644131
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C189_122_118 done by SNFS
 

Polynomial is 2^4*59^2*(59^20)^6+61^4*(61^19)^6; SNFS difficulty 217.2, but Murphy_E 4.719e-13

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Wed Oct 21 13:55:14 2015 prp85 factor: 1216498811161336424774914416157818671542013161814374828421542164233597798977475515841
Wed Oct 21 13:55:14 2015 prp105 factor: 175080523299606430590243443633379316626783755965807191068155090065052831582275074272376182791666309132817
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95.0 CPU-hours on 4 threads i7/4790K for linear algebra; around 33.4 million CPU-seconds on K10/1900MHz CPUs to sieve.

Hope I collected them all: [url]http://www.primefan.ru/xyyxf/results.html#0[/url]

[QUOTE=swellman;412139]Reserving...C205_146_33 for ECM=>SNFS. Thanks.[/QUOTE]

Please change reservation to NFS@Home. It went sideways on me and they came to the rescue. Thank you.