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-   -   Found a factor, sunshine? Embalm and entomb it here! (RU "Выкрасить и выбросить")) (https://www.mersenneforum.org/showthread.php?t=13977)

Dr Sardonicus 2022-03-19 11:51

[QUOTE=lisanderke;602076]I've found three 100+ bits factors yesterday! (the first one is the biggest one I've found so far :smile:) Out of a total of 6 factors found yesterday in this range, and 4 so far today.
108.509 bits 461809633522436002942667757126991
105.164 bits 45433175071599793822345482321409
and 101.612 bits 3876227996028611127615928931137[/QUOTE]

All prime factors. Exponents 397849, 397921, and 397763 respectively. Nice!

Jwb52z 2022-03-20 04:46

P-1 found a factor in stage #2, B1=470000, B2=13239000.
UID: Jwb52z/Clay, M111561421 has a factor: 292165419952881010847303 (P-1, B1=470000, B2=13239000)

77.951 bits.

lisanderke 2022-03-20 14:03

P-1 found a factor in stage #2, B1=5550000, B2=25042991610.
UID: lisander/Desktop, M264577 has a factor: 2402275378448533966401395387089 (P-1, B1=5550000, B2=25042991610)

100.922 bits,

P-1 found a factor in stage #2, B1=5550000, B2=25042991610.
UID: lisander/Desktop, M264949 has a factor: 6338247571356035076996173356273 (P-1, B1=5550000, B2=25042991610)

102.322 bits and

P-1 found a factor in stage #2, B1=5550000, B2=25042991610.
UID: lisander/Desktop, M265261 has a factor: 20805253139081811010440552183169 (P-1, B1=5550000, B2=25042991610)

104.037 bits!

lisanderke 2022-03-20 17:21

Today I keep getting bigger factors! The second one marks my biggest P-1 factor found result yet :D

P-1 found a factor in stage #2, B1=5550000, B2=22789551330.
UID: lisander/Desktop, M270587 has a factor: 11390997669503257588498195779889 (P-1, B1=5550000, B2=22789551330)

103.168 bits and

P-1 found a factor in stage #2, B1=5550000, B2=25042991610.
UID: lisander/Desktop, M267803 has a factor: 2453115957213008539833758634913543 (P-1, B1=5550000, B2=25042991610)

110.918 bits!

mrh 2022-03-24 22:46

[M]M111744023[/M] has a 90.093-bit (28-digit) factor: [url=https://www.mersenne.ca/M111744023]1320668811711078898367468881[/url] (P-1,B1=510000,B2=18454000)

Not that exciting, but I wanted to share [B]something[/B] :grin:

SethTro 2022-03-26 05:11

M19414627 has a factor: 259213687242140687678761255384193 (107.676 bits)

My largest factor in the last few months and it was found in stage 1 with B1=800,000!

Jwb52z 2022-03-31 00:13

P-1 found a factor in stage #2, B1=474000, B2=13535000.
UID: Jwb52z/Clay, M113023661 has a factor: 1708323868535427894994746353 (P-1, B1=474000, B2=13535000)

90.465 bits.

Jan S 2022-03-31 20:00

P-1 found a factor in stage 1
 
[M]113076559[/M]

B1=1230000, 229904281138151649356554790047, 97.537 bits.

petrw1 2022-04-03 00:53

3 consecutive P-1 factors from same PC
 
Speck 14722069 F-PM1 2022-04-03 00:42 0.0 Factor: 350629376069681599185084001 / (P-1, B1=1700000, B2=616212870) 27.8934
Speck 14722031 F-PM1 2022-04-02 22:31 0.0 Factor: 7249170428405224821889 / (P-1, B1=1700000, B2=616212870) 27.8934
Speck 14719489 F-PM1 2022-04-02 20:20 0.0 Factor: 7636005682848927790894801 / (P-1, B1=1700000, B2=616212870) 27.8934

storm5510 2022-04-04 13:50

This is from GMP-ECM, and an error on my part:

[CODE]********** Factor found in step 2: 223
2022-04-04 09:43:03.243 Found prime factor of 3 digits: 223
2022-04-04 09:43:03.243 Composite cofactor (2^7363-1)/223 has 2215 digits[/CODE]

This is for M7363 which does not appear in any database I can find. I had intended M4363. Make of it what you will.

James Heinrich 2022-04-04 13:55

[QUOTE=storm5510;603269]This is for M7363 which does not appear in any database I can find.[/QUOTE]7363 is not prime, therefore it's not a Mersenne number.


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