ECM results and reservations

[XYYXF]

You mean C211_137_76? :)

[swellman]

Originally Posted by XYYXF

You mean C211_137_76? :)

Yes, my error. C211_137_76, as well as C283_149_143 and C211_137_53.



FWIW, ECM of C200_150_148 and C252_137_120 should finish this week. No factors found so far...

[wombatman]

Running C204_115_88 to t50 (7600 curves at B1=43M)

[swellman]

Originally Posted by wombatman

Running C204_115_88 to t50 (7600 curves at B1=43M)

Wombatman - just a heads up that yoyo@Home has ECM'd that number to t50 already. They are running each composite to t50, by increasing x. The wavefront currently sits at x=134.

Pick another number to ECM, with say x>136. Or NFS a number. Or ECM a number to the t55 level (which is tedious but always welcome).

[wombatman]

Shoot. I checked the yoyo page and didn't find it on there, so I thought it hadn't been touched yet. Oh well. I'll take C175_136_61 to t50 then.

[swellman]

Originally Posted by swellman

Reserving C205_137_73 and C252_137_120. I'll take them to t50.

C252_137_120 run for 7600 curves @B1=43M with no factors found. Releasing number.

[wombatman]

7600 curves at B1=43M give no factors for C175_136_61.

[swellman]

Originally Posted by swellman

I will take it up to t55.

Ran this for 18000 curves @B1=110M with no factors found. Releasing number.

[swellman]

Ryan has factored 113_96 into a p58 * p65 * p83.

See http://factordb.com/index.php?id=1000000000044715137.

The p58 was found by ECM, the rest by GNFS. I've requested the log file for the ECM run.

[swellman]

Originally Posted by swellman

I will ECM C283_149_143...to the t50 level.

C283_149_143 run for 7600 curves @B1=43M. No factors found. Releasing number.

[swellman]

Originally Posted by swellman

Ryan has factored 113_96 into a p58 * p65 * p83.

See http://factordb.com/index.php?id=1000000000044715137.

The p58 was found by ECM, the rest by GNFS. I've requested the log file for the ECM run.

ECM log file follows.

GMP-ECM 6.4.4 [configured with GMP 6.0.0, --enable-asm-redc] [ECM]
Input number is 1512672401616870943428445169306180337813126448281097463709323831815444265264331809523566532125812008625858609855069445131411852868674401704323966993488160894818089360378129584817367934737009870508346767231 (205 digits)
Using MODMULN [mulredc:0, sqrredc:2]
Using B1=110000000, B2=776278396540, polynomial Dickson(30), sigma=1736500047
dF=131072, k=4, d=1345890, d2=11, i0=71
Expected number of curves to find a factor of n digits:
35 40 45 50 55 60 65 70 75 80
34 135 614 3135 17884 111314 752662 5482978 4.3e+07 3.6e+08
Step 1 took 661049ms
Using 25 small primes for NTT
Estimated memory usage: 566M
Initializing tables of differences for F took 487ms
Computing roots of F took 22166ms
Building F from its roots took 8893ms
Computing 1/F took 3724ms
Initializing table of differences for G took 346ms
Computing roots of G took 15827ms
Building G from its roots took 10623ms
Computing roots of G took 15849ms
Building G from its roots took 8667ms
Computing G * H took 1794ms
Reducing G * H mod F took 2296ms
Computing roots of G took 16090ms
Building G from its roots took 10072ms
Computing G * H took 1986ms
Reducing G * H mod F took 1913ms
Computing roots of G took 15718ms
Building G from its roots took 9355ms
Computing G * H took 1826ms
Reducing G * H mod F took 1934ms
Computing polyeval(F,G) took 14499ms
Computing product of all F(g_i) took 62ms
Step 2 took 164614ms
********** Factorfound in step 2: 7325778633066287624866260988213923162387125986617707180257
Found probable prime factor of 58 digits: 7325778633066287624866260988213923162387125986617707180257
Composite cofactor 206486228615909565904829430181076276136895100907803625146780872755001481056384180130287527931568093824658510414387889843519932735417758011340018783 has 147 digits