[QUOTE=LaurV;403638]For how much ECM was done on these thingies, there is a [U]very[/U] slim chance that P-1 finds a factor.[/QUOTE]

Yeah, that could very well be true, I was just goofing around with the P-1 stuff and thought I'd see, just push it a little past where it was.

I'd done some ECM on M1277 previously and I may return to that once I tidy up this triple-checking... I'm still a little dissatisfied with the complexity of using Prime95 for stage 1 and GMP-ECM for stage 2, and all that goes into that, but oh well, if that's not a first world problem, I don't know what is. :smile:

no a big one... but smooooooooooooooth :smile:

P-1 found a factor in stage #1, B1=685,000.
M74,149,633 has a factor: 54,782,821,866,922,527,235,217 (75.53 Bits)
k = 369,407,235,413,576 = 2[SUP]3[/SUP] * 31 * 53 * 163 * 433 * 491 * 811

Oliver

[QUOTE=Madpoo;403648]I was just goofing around with the P-1 stuff and thought I'd see, just push it a little past where it was[/QUOTE]
Man, I am not criticizing, just stating a fact. Don't forget that I was the "silly" who did that huge P-1 for M1061. You never know where the luck stays crouching... hehe...

A giant factor (421 bits) for M991 was reported a couple of hours ago by George Woltman.
I wonder how it was found...

[QUOTE=lycorn;404322]A giant factor (421 bits) for M991 was reported a couple of hours ago by George Woltman.
I wonder how it was found...[/QUOTE]

[url]http://www.mersenneforum.org/showthread.php?t=20308[/url]

Thx.

[url]http://mersenneforum.org/showthread.php?t=19711[/url]

[url]http://mersenneforum.org/showthread.php?t=19821[/url]

P-1 found a factor in stage #2, B1=1000000, B2=30000000, E=12.
M974329 has a factor: 713552035392139301665463340620467463 (P-1, B1=1000000, B2=30000000, E=12)

k = 47 × 727 × 887 × 1049 × 6079 × 10333 × 14071 × 13030921

Somewhat interesting factor....
 

48713897 F 1111103198672818834999

P-1 found a factor in stage #2, B1=620000, B2=11470000.
UID: Jwb52z/Clay, M72551777 has a factor: 62016063905814958506247

75.715 bits

[Fri Jul 31 10:24:52 2015]
ECM found a factor in curve #1, stage #2
Sigma=1802940857370980, B1=50000, B2=5000000.
UID: nitro/haswell, M10747343 has a factor: 7860697152906126698999041 (ECM curve 1, B1=50000, B2=5000000), AID: D9BFB39C3F0944893BACD085A53******

[URL="http://www.mersenne.ca/exponent/10747343"]82.7 bits[/URL]

74,000 days to do TF on :exclaim: