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-   -   Found a factor? Post it here. Or forever hulled your peas. (https://www.mersenneforum.org/showthread.php?t=13977)

 James Heinrich 2023-03-20 18:51

[QUOTE=LordJulius;627100]Why skip TF 2^79 to 2^80 ?[/QUOTE]He probably did it, but since it now shows up as a [URL="https://www.mersenne.ca/tfgaps.php"]TF gap[/URL] I re-did it:
[c]no factor for M333333493 from 2^79 to 2^80 [mfaktc 0.21 barrett87_mul32_gs]
tf(): total time spent: 44m 8.503s[/c]

[QUOTE=kriesel;627101]DC avoided, and with a ~106. bit factor found[/QUOTE]Or, [URL="https://www.mersenne.ca/json2bbcode.php"]formatted[/URL]:[quote][M]M106971629[/M] has a 105.971-bit (32-digit) factor: [url=https://www.mersenne.ca/M106971629]79534574109359138908214691895351[/url] (P-1,B1=582000,B2=190186920)
k = 3^2 * 5^2 * 7 * 233 * 953 * 1901 * 4643 * 120433463[/quote]

 Jwb52z 2023-03-21 03:41

P-1 found a factor in stage #2, B1=501000, B2=16987500.
UID: Jwb52z/Clay, M117383251 has a factor: 4607805263510756479738961 (P-1, B1=501000, B2=16987500)

81.930 bits.

 Miszka 2023-03-21 16:07

I found 4 factors: sixth (254707775084069984279 - 67.8 bits); seventh (1026695470153012861417 - 69.8 bits); eighth (8651909121526379308519 - 72.9 bits) and ninth (29616184428737548369319 - 74.6 bits) for [URL="https://www.mersenne.ca/exponent/662869847 "]M662869847[/URL]

 James Heinrich 2023-03-21 16:21

[QUOTE=Miszka;627135]I found 4 factors[/QUOTE]Nice! The smallest one would've been found in a few weeks by TJAOI, but you got there first.

Outside GIMPS range, but I recently found 3 factors for M[ca]4267897171[/ca] within 0.85 bits of each other:
73.915-bit M4267897171 has a factor: 17807676876562259133311
74.723-bit M4267897171 has a factor: 31174335411508659346271
74.765-bit M4267897171 has a factor: 32092274269846547707271

 Andrew Usher 2023-03-22 01:20

Magellan3s has again created a TF gap, twice, at M333332983. I think he needs to be more careful about something though I can't say what his specific issues are.

 Jwb52z 2023-03-28 17:15

P-1 found a factor in stage #2, B1=501000, B2=16995900.
UID: Jwb52z/Clay, M117434651 has a factor: 332080701788486498904361 (P-1, B1=501000, B2=16995900)

78.136 bits

 mrh 2023-03-31 00:45

Haven't had a good one in a while...

[M]M117447403[/M] has a 100.699-bit (31-digit) factor: [url=https://www.mersenne.ca/M117447403]2057663870335603786720006189831[/url] (P-1,B1=907000,B2=649707300)
k = 3 * 5 * 727 * 226451 * 677177 * 5238403

 Jwb52z 2023-04-03 18:15

P-1 found a factor in stage #2, B1=527000, B2=18684300.
UID: Jwb52z/Clay, M117459959 has a factor: 147923770841301588045241369 (P-1, B1=527000, B2=18684300)

86.935 bits

 Miszka 2023-04-06 10:32

[M]M1105519[/M] has a factor: 2915595290210483905698188678755302313032196817 (151.031 bits, 46 digits). It's my new personal record largest factor for P-1 method

 slandrum 2023-04-09 19:35

[M]117500689[/M] has a factor 103722339425702942846017362029801 - by far the largest I've found, 33 digits 106.354 bits, found with default assigned P-1 and found in stage 1!

 Jwb52z 2023-04-11 15:38

P-1 found a factor in stage #2, B1=528000, B2=18709500.
UID: Jwb52z/Clay, M117613057 has a factor: 3949314306453103880260750279 (P-1, B1=528000, B2=18709500)

91.674 bits

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