[QUOTE=retina;463617]Welcome to planet Earth where not everyone follows the same digit grouping conventions.[/QUOTE]

Just to put on the table...

It can sometimes be amusing to push the envelope, and see what happens.

P-1 found a factor in stage #2, B1=695000, B2=13205000.
UID: Jwb52z/Clay, M82642103 has a factor: 3695652401483277360772926673 (P-1, B1=695000, B2=13205000),

91.578 bits.

It was a typo, actually, in my case, but I do know that Europeans don't use commas and periods the way Americans do. I haven't done that before by mistake.

P-1 found a factor in stage #2, B1=665000, B2=12136250.
UID: Jwb52z/Clay, M83404637 has a factor: 5589507944734239641155009 (P-1, B1=665000, B2=12136250)

82.209 bits.

I pilfered a factor from FactorDB.

M[M]1489[/M] has a factor: 95909518295775374166321292697000685895150503357477127

(53 digits)

It was [URL="http://factordb.com/index.php?id=1100000000956003192"]reported (by who?) to FactorDB on August 17[/URL]. The remaining 295-digit cofactor is composite.

Note that a 68-digit factor of M[M]1471[/M] was reported to FactorDB on August 31, and this was [URL="http://mersenneforum.org/showthread.php?t=19407&p=466979"]spotted by axn a few days later[/URL]. M1471 is now fully factored.

I ran a systematic check via a screenscraping script just now, comparing all factors for exponents below 10,000 and found this new factor.

Someone out there is finding large new factors for very small Mersenne exponents, independently of GIMPS. I guess it's worthwhile to rerun the script every few weeks or so, going forward.

Just a month ago, I ran a systematic crosscheck of exponents under 1 million (prompted by [URL="http://mersenneforum.org/showthread.php?t=22501"]this thread[/URL]), and synchronized the data on both FactorDB and GIMPS. Obviously, the new factors for M1471 and M1489 were reported to FactorDB more recently than this.

P-1 found a factor in stage #2, B1=665000, B2=12136250.
UID: Jwb52z/Clay, M83218433 has a factor: 11731332775665701203434915133649 (P-1, B1=665000, B2=12136250)

103.210 bits.

P-1 found a factor in stage #2, B1=665000, B2=12136250.
UID: Jwb52z/Clay, M83536261 has a factor: 7490746336097080588566003191 (P-1, B1=665000, B2=12136250)

92.597 bits.

P-1 found a factor in stage #2, B1=670000, B2=12562500.
UID: storm5510/7700_Kaby_Lake, M84195253 has a factor: 2369133135664536495703801369 (P-1, B1=670000, B2=12562500)

90.936 bits.

P-1 found a factor in stage #2, B1=670000, B2=12562500.
UID: storm5510/7700_Kaby_Lake, M84215177 has a factor: 46028976926137780014126464377 (P-1, B1=670000, B2=12562500)

95.217 bits.

This is the second one in as many days.

P-1 found a factor in stage #2, B1=670000, B2=12395000.
UID: Jwb52z/Clay, M84557219 has a factor: 98272228738510755321309371330593 (P-1, B1=670000, B2=12395000)

106.277 bits.

Over 138 Bits
 

2307677
F-PM1
2017-12-06 02:44
Factor: 305924195866403106191552498276182730434001 / (P-1, B1=6000000, B2=180000000, E=12)