Factored into p56 * p71. Added to FactorDB: [url]http://factordb.com/index.php?id=1100000000720731308[/url]

Need help! An ECM cofactor appeared:

[code]C137_137_67 = 13411098070018782631679823987393159841418050549249170473703223779558186373665856345833655924842351838058687221767661026951401060817978733[/code]

[QUOTE=XYYXF;388658]Need help! An ECM cofactor appeared:

C137_137_67

[/QUOTE]

I'll take it if still available.

Thank you Sean. The pages are ready to update, waiting only for this out-of-range C137 :-)

C137_137_67 Factored
 

[code]
prp88 = 1616672612414735861055959476666696561806681752719282755662328665217634856354131147062031
prp49 = 8295494070371709714792648978157416051359892629443
[/code]

C158_136_134 is currently the smallest composite in the project:
[code]84311455579199090648493230576403161968451360234506586342094132063229517346160992903240099249802174895769891679510634920540783201237119607493881630083817780573[/code]

Survived 7600 ECM curves with B1 = 43M.

C137_138_71 appeared as ECM cofactor:
[code]18288381955467503372160935180653992126384127166955009976845615170138626077630969950667827923941880943984217768707293257384674775252629047[/code]

Needs GNFS :)

I'll do it. It'll be 2-3 days before I can start sieving, then 1-2 days to factor it.

Chris

I was able to start earlier than I planned: [code]
r1=1910592350332312344954173307808537989772745520672358069279284815417 (pp67)
r2=9572100480924973982654011469154758475505608417721162158677805643153391 (pp70) [/code]
Chris

[QUOTE=XYYXF;392300]C158_136_134 is currently the smallest composite in the project:
[code]84311455579199090648493230576403161968451360234506586342094132063229517346160992903240099249802174895769891679510634920540783201237119607493881630083817780573[/code]

Survived 7600 ECM curves with B1 = 43M.[/QUOTE]

I would like to reserve this number. Thanks.

[QUOTE=XYYXF;392300]C158_136_134 is currently the smallest composite in the project:
[code]84311455579199090648493230576403161968451360234506586342094132063229517346160992903240099249802174895769891679510634920540783201237119607493881630083817780573[/code]

Survived 7600 ECM curves with B1 = 43M.[/QUOTE]


[code]
prp74 = 25215735017476399188221707913939290849893455547510507343121538511693643837
prp85 = 3343604916563602702793591893310195173046401116014447918399886944921687229788345088929
[/code]

Factored by GNFS.