[QUOTE=Jwb52z;522982]109.146 bits![/QUOTE]By my count that's [url=https://www.mersenne.ca/pm1user/789]your #4[/url] all-time biggest :smile:

P-1 found a factor in stage #2, B1=575000, B2=18687500, E=12.
UID: harlee/i5-5250U_1600, M9970603 has a factor: 14724706906047922109582216266621697 (P-1, B1=575000, B2=18687500, E=12)

113.504 bits!

[QUOTE=harlee;523240]113.504 bits![/QUOTE]And with a very smooth k, it should actually have been found with the previous P-1 run waay back in July 2000:
[url]https://www.mersenne.ca/exponent/9970603[/url]

Now a small one
[URL="https://www.mersenne.org/report_exponent/?exp_lo=92303513&full=1"]M92303513[/URL] / [URL="http://www.mersenne.ca/factor/379742139514967992231801"]379742139514967992231801[/URL]
78.329 bits. Almost TF range.

I got one!
 

2^284.508.079-1 has a factor of 965.748.892.491.730.331.561

[url]https://www.mersenne.ca/exponent/284508079[/url]

M273803 has a factor.

Factor: 14621477683807587588436848342429799 / (ECM curve 14, B1=250000, B2=25000000)

113.494 bits

Quite large for the bounds used.

Another one larger than expected:

M275399 has a factor.

Factor: 157348431025891503797857466195609 / (ECM curve 59, B1=250000, B2=25000000)

106.956 bits

P-1 found a factor in stage #2, B1=710000, B2=12602500.
UID: Jwb52z/Clay, M93609431 has a factor: 2176845263049295036367884529 (P-1, B1=710000, B2=12602500),

90.814 bits.

P-1 found a factor in stage #1, B1=820000.
UID: Jwb52z/Clay, M94891409 has a factor: 997387267742849938693943 (P-1, B1=820000)

79.722 bits.

Found one for [M]99111179[/M] - [URL="https://www.mersenne.ca/exponent/99111179"] 13267822998683836364728039[/URL] 83.456 bits which I thought was pretty cool.

What if you had found this one?
11510125
:whistle: