ECM-challange
 

I offer 50$ for finding a non trivial factor of the following number:
(2^530-1)*10^160+2^529-1

[QUOTE=enzocreti;496495]I offer 50$ for finding a non trivial factor of the following number:
(2^530-1)*10^160+2^529-1[/QUOTE]

[url]http://www.factordb.com/index.php?id=1100000001104431640[/url] :whistle:

ECM
 

Yes i know it. But factordb will never find a factor! This is a task for yafu or ecm-gmp.

axn just pointed you to the fact that [U]a factor was already found[/U]. If you are not only blabbing about those money awards, and want to put your money where your mouth is, then please donate the $50 to fdb, or to mersenneforum... :razz:

[QUOTE=LaurV;496504]axn just pointed you to the fact that [U]a factor was already found[/U]. If you are not only blabbing about those money awards, and want to put your money where your mouth is, then please donate the $50 to fdb, or to mersenneforum... :razz:[/QUOTE]

Sorry!

OFFER RETIRED
 

[QUOTE=enzocreti;496513]Sorry![/QUOTE]
I RETIRE THE OFFER. Sorry but I found that in factordb there is yet a factor!!!

Does anyone have a bag of nails?
One would like to compare. [SPOILER]Is it heavier or not than this thread....[/SPOILER]