M(57,885,161)
 

Some unanswered questions:

What machine found it?
How far had it been TFed?
Who did the last bitlevel?

I ask the last question because this task is relatively unrewarding factor-finding-wise, but valuable to the LL test. To encourage TFing to the optimum level, I think it appropriate that the person who did it should be rewarded with a token acknowledgement when a prime is discovered.
Perhaps P-1 deserves similar.

D

[QUOTE=davieddy;335883]How far had it been TFed?
Who did the last bitlevel?[/QUOTE]

[url]http://www.mersenne.ca/exponent/57885161[/url]
It had been TFd to 73 bits, the last bit level by Jerry Hallett. It had stage 1-only P-1 run at B1=710000 by an unknown machine (might've been the one that tested it as prime, but as it had previously been reserved and subsequently unreserved/expired by two separate anonymous assignees, one of them might have done it). I think Cooper had mentioned the machine's ID that found the prime in some interview...
Edit: Here's an [URL="http://www.ucmo.edu/news/prime.cooper.2013.cfm"]article with a pic[/URL] of Cooper with the computer; it calls it "Computer #22 in a computer lab in Wood 210 on the UCM campus"

THX Mini
[URL="http://www.youtube.com/watch?v=ukOs3am7CtE"]King Curtis[/URL]

Expect to see this appear in "useless posts" shortly.
(Reason: lack of imagination on the part of the mod concerned)

D

[QUOTE=davieddy;335883]Who did the last bitlevel?
[...]
To encourage TFing to the optimum level, I think it appropriate that the person who did it should be rewarded with a token acknowledgement when a prime is discovered.[/QUOTE]
Perhaps the real kudos should go to anyone who now trial factors M57885161 to further bit levels, discovers a factor, and thereby proves that the axioms on which mathematics has been based are inconsistent. Then GIMPS really will go down in history as discovering something important.:devil: