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-   -   Factoring humongous Cunningham numbers (https://www.mersenneforum.org/showthread.php?t=5722)

FactorEyes 2009-05-19 13:08

[QUOTE=FactorEyes;173908]Regrettable if it happens, but I make no guarantees. Force majeure.[/QUOTE]

Aw, blast!

[CODE]11,3,163+ (P62.P108):
30556091035598962077698413132112923836577405502889334458978433
130551495116541763225357524118631332769933048513963325900652166033897790522339536207900945944303230194493409

11,7,167+ (P58.P84):
1272005442321579689524365952305632226814228274000116089827
312015433733802621889618775001201778298458362790254918197751109933640094316694263793
[/CODE]

Looks as if my rho or SQUFOF executed spontaneously.

FactorEyes 2009-05-20 17:37

49 cosmopolitan factors remaining
 
10^178+3^178 done. C137 = P60.P78:
[CODE]
642148002219988747424531941683071921531867826590194512541277
153517327861601300083057135437187570295275388635805491755426490673321233322221
[/CODE]

49 composites remaining.

unconnected 2009-06-06 00:57

10,7,193- done
[code]r1=7893467543205277403724250794278746426391603828821170993333449 (pp61)
r2=39159559142036115302705244870655361826198555900479867328910173188115893391258203140703563684381158586800097377311322283 (pp119)
[/code]48 composites remaining, it's time to extend tables?

Andi47 2009-06-06 06:12

[QUOTE=unconnected;176149]
48 composites remaining, it's time to extend tables?[/QUOTE]

I agree - wanting a few easy c9x's for benchmarking the new msieve 1.42 beta

xilman 2009-06-06 17:21

[QUOTE=Andi47;176169]I agree - wanting a few easy c9x's for benchmarking the new msieve 1.42 beta[/QUOTE]I'll see what can be done. The delay is largely because I've been over-busy with Real Work (TM).

Everything in the extentions under C100 has long been completed, though.

Paul

yoyo 2009-06-06 17:23

Where is the complete list of to be done numbers?
Should I run some ECM curves on it?
yoyo

Yamato 2009-06-06 17:35

[QUOTE=yoyo;176230]Where is the complete list of to be done numbers?
Should I run some ECM curves on it?
yoyo[/QUOTE]

Pick a number listed on the reservation page:
[url]http://www.chiark.greenend.org.uk/ucgi/~twomack/homcun.pl[/url]

These numbers have been extensively ecm'ed. If you run some curves, then I would recommend a high B1 value. I have run thousands of curves with B1=43e6, without success.

henryzz 2009-06-06 18:53

[quote=Andi47;176169]I agree - wanting a few easy c9x's for benchmarking the new msieve 1.42 beta[/quote]
c92=51325607227672924960802054317640105872789069642849645350853420071019609526091704973842463367
c93=339772802883176116304543854244958639157459375892786024089728468713335683937078357811016693439
are these helpful?
if you factor them could you add them into the factorization database please and let me know

Andi47 2009-06-07 09:44

[QUOTE=henryzz;176249]c92=51325607227672924960802054317640105872789069642849645350853420071019609526091704973842463367
[/QUOTE]

c92=7714719584596623051393814070279*6652945277512192262797437411178207423940726861172254378227073

GNFS with msieve 1.42 beta poly selection, GGNFS sieving and msieve postprocessing took 1:21:20 hours on a core 2 duo @ 2.0 GHz (every step running only one-threaded).

For comparison: yafu took 1:50:00 hours for this number.

10metreh 2009-06-07 09:59

If you want a number with n bits (remember it's bits!) for benchmarking, just run [code]yafu rsa(n)[/code]
It will give you the number, but it will not run QS or anything on it.

Andi47 2009-06-07 12:35

[QUOTE=henryzz;176249]
c93=339772802883176116304543854244958639157459375892786024089728468713335683937078357811016693439
are these helpful?
if you factor them could you add them into the factorization database please and let me know[/QUOTE]

c93 = 2720757458437987220081314406549*124881694922649562358134231192479292003389532514645189643108611

poly search (msieve 1.42 beta): 13:24 minutes
sieving + postprocessing (FactMsieve.pl): 1.95 hours (with some bad luck - filtering wanted a fistful (~20k) more relations in the first place, and then - according to the factmsieve-parameters - it sieved another 60kQ range (getting 614k additional relations) and ended up quite oversieved.)


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