A factor was found today (not by me) for the previously unfactored [M]M11027[/M]. Congratulations.

Right. A great shot. Was it Sid or Andy? ;)

[QUOTE=GP2;456811]A factor was found today (not by me) for the previously unfactored [M]M11027[/M]. Congratulations.[/QUOTE]

S&A broadcast an ambition to find something like this back earlier in the year!
Likely, mission accomplished.

[QUOTE=snme2pm1;456828]S&A broadcast an ambition to find something like this back earlier in the year!
Likely, mission accomplished.[/QUOTE]

Tis I ...Tis I :fusion:

Etch 11027 F-ECM 2017-04-15 18:04 288363872191768892050551279270150054945736765655279

Mission Phase I. I'd like to find 2 more. :fingerscrossed:

[QUOTE=petrw1;456839]Tis I ...Tis I :fusion:

Etch 11027 F-ECM 2017-04-15 18:04 288363872191768892050551279270150054945736765655279

Mission Phase I. I'd like to find 2 more. :fingerscrossed:[/QUOTE]

Nice find!

Back to 4007....

[QUOTE=petrw1;456839]Tis I ...Tis I :fusion:

Etch 11027 F-ECM 2017-04-15 18:04 288363872191768892050551279270150054945736765655279
[/QUOTE]

Congratulations again.

I think you're also working on Fermat number F12 (2[SUP]4096[/SUP]+1) ?

You should specify the already-known factors in the worktodo line, otherwise you will keep rediscovering them and reporting them to PrimeNet.

[CODE]
ECM2=1,2,4096,1,800000000,80000000000,1,"114689,26017793,63766529,190274191361,1256132134125569,568630647535356955169033410940867804839360742060818433"
[/CODE]

[QUOTE=GP2;456923]Congratulations again.

I think you're also working on Fermat number F12 (2[SUP]4096[/SUP]+1) ?

You should specify the already-known factors in the worktodo line, otherwise you will keep rediscovering them and reporting them to PrimeNet.

[CODE]
ECM2=1,2,4096,1,800000000,80000000000,1,"114689,26017793,63766529,190274191361,1256132134125569,568630647535356955169033410940867804839360742060818433"
[/CODE][/QUOTE]

I was assuming (seems incorrectly) that PrimeNet would do that for me.
I simply ask for ECM-FERMAT assignments and it give me 4096 for example with a line like this...only specifying 1 known factor.

ECM2=<id>,1,2,4096,1,800000000,80000000000,3,"1256132134125569"

[QUOTE=petrw1;457010]I was assuming (seems incorrectly) that PrimeNet would do that for me.
I simply ask for ECM-FERMAT assignments and it give me 4096 for example with a line like this...only specifying 1 known factor.

ECM2=<id>,1,2,4096,1,800000000,80000000000,3,"1256132134125569"[/QUOTE]

That would be a bug. The relevant lines for Fermat numbers, assuming 3 curves, should be:

[CODE]
ECM2=1,2,4096,1,800000000,80000000000,3,"114689,26017793,63766529,190274191361,1256132134125569,568630647535356955169033410940867804839360742060818433"
ECM2=1,2,8192,1,260000000,26000000000,3,"2710954639361,2663848877152141313,3603109844542291969,319546020820551643220672513"
ECM2=1,2,16384,1,260000000,26000000000,3,"116928085873074369829035993834596371340386703423373313"
ECM2=1,2,32768,1,110000000,11000000000,3,"1214251009,2327042503868417,168768817029516972383024127016961"
ECM2=1,2,65536,1,110000000,11000000000,3,"825753601,188981757975021318420037633"
ECM2=1,2,131072,1,110000000,11000000000,3,"31065037602817,7751061099802522589358967058392886922693580423169"
ECM2=1,2,262144,1,44000000,4400000000,3,"13631489,81274690703860512587777"
ECM2=1,2,524288,1,44000000,4400000000,3,"70525124609,646730219521,37590055514133754286524446080499713"
ECM2=1,2,1048576,1,44000000,4400000000,3
ECM2=1,2,2097152,1,11000000,1100000000,3,"4485296422913"
ECM2=1,2,4194304,1,11000000,1100000000,3,"64658705994591851009055774868504577"
ECM2=1,2,8388608,1,3000000,300000000,3,"167772161"
ECM2=1,2,16777216,1,3000000,300000000,3
ECM2=1,2,33554432,1,1000000,100000000,3,"25991531462657,204393464266227713,2170072644496392193"
ECM2=1,2,67108864,1,250000,25000000,3,"76861124116481"
ECM2=1,2,134217728,1,250000,25000000,3,"151413703311361,231292694251438081"
ECM2=1,2,268435456,1,250000,25000000,3,"1766730974551267606529"
ECM2=1,2,536870912,1,50000,5000000,3,"2405286912458753"
[/CODE]

It's a problem, because ECM testing by default stops as soon as any factor is found. So if it keeps finding existing factors, the effort is more or less wasted.

Wouldn't it be much more efficient to run ECM work on the 1187 digit composite rather than the original number?

P-1 for P.I.E.S. (PhiExtensions=1; KeepPminus1SaveFiles=0)
 

[CODE]30434^2097152-30434^1048576+1 has a factor: 40099774805853786341377 (P-1, B1=7500, B2=100000)[/CODE]
... ergo: P-1 is not useless for P.I.E.S.

[QUOTE=Batalov;457435][CODE]30434^2097152-30434^1048576+1 has a factor: 40099774805853786341377 (P-1, B1=7500, B2=100000)[/CODE]
... ergo: P-1 is not useless for P.I.E.S.[/QUOTE]

[CODE]? allocatemem(1000000000)
*** Warning: new stack size = 1000000000 (953.674 Mbytes).
? #digits(30434^2097152-30434^1048576+1)
9402286
[/CODE]

:omg: