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 firejuggler 2021-10-06 17:07

[M]M6220651[/M] has a 96.568-bit (30-digit) factor: [url=https://www.mersenne.ca/M6220651]117465933684061090230298707631[/url] (P-1,B1=3000000,B2=243000000)

96 bits. at this exponent size, this is a beauty.

 James Heinrich 2021-10-08 23:06

Not the normal kind of factor posted here, but I was YAFU'ing a C107 that was already ECM'd appropriately, but YAFU 1.34 likes to recalculate ECM effort and do a few more curves, which actually worked beautifully this time:[code]current ECM pretesting depth: 35.52
scheduled 67 curves at B1=3000000 toward target pretesting depth of 35.67
prp37 = 5217870316310181049264840173981775799 (curve 1 stg2 B1=3000000 sigma=3040696252 thread=0)[/code]The first (second?) curve split the C107=p37+p70
What I expected to take ~8000 seconds took 9.5s :w00t:

 kruoli 2021-10-09 22:03

[SIZE="1"][SPOILER]If I understand correctly, this one is only for factors of Mersenne numbers with prime exponents.[/SPOILER][/SIZE]

 James Heinrich 2021-10-09 22:36

 Jwb52z 2021-10-21 04:03

P-1 found a factor in stage #2, B1=756000, B2=20988000.
UID: Jwb52z/Clay, M107023759 has a factor: 15845389801763193699707633 (P-1, B1=756000, B2=20988000)

83.712 bits.

 bur 2021-10-24 11:56

Nothing spectacular, but the first P-1 tests I did in a while and the first to finish stage 1 returned:

[CODE][Worker #3 Oct 24 07:53] P-1 found a factor in stage #1, B1=779000.
[Worker #3 Oct 24 07:53] M107043329 has a factor: 9773787110913045103371451921 (P-1, B1=779000)

k = 45653415314246463240 = 2^3 × 3^3 × 5 × 11 × 21841 × 317797 × 553649[/CODE]

 Jwb52z 2021-10-29 20:37

P-1 found a factor in stage #1, B1=756000.
UID: Jwb52z/Clay, M107072687 has a factor: 95352689558688112327801 (P-1, B1=756000)

76.336 bits.

 firejuggler 2021-10-30 06:12

[M]M6234491[/M] has a 107.827-bit (33-digit) factor: [url=https://www.mersenne.ca/M6234491]287831359132009723766012795757047[/url] (P-1,B1=3000000,B2=243000000)

k=23 × 223 × 277 × 129 971 × 627 611 × 199 185 461

 chalsall 2021-10-31 03:55

[URL="https://www.mersenne.ca/exponent/5551831"]Sometimes you just have to laugh at stats...[/URL]

This was a "one-off" timing test.

 nordi 2021-10-31 13:58

[M]M260543[/M] has a 102.431-bit (31-digit) factor: [URL="https://www.mersenne.ca/M260543"]6833981637847127989838565387041[/URL] (ECM,B1=1000000,B2=162000000,Sigma=3342767857012760)
That's the 9th known factor, Seth_Tr found the 8th factor in May.

[M]M194653[/M] has a 124.361-bit (38-digit) factor: [URL="https://www.mersenne.ca/M194653"]27323512924583858950580510798298798737[/URL] (ECM,B1=3000000,B2=477000000,Sigma=6798721071652496)
That's the [B]10th known factor[/B] :smile:, I found the 9th factor 2 months ago.

 masser 2021-10-31 16:41

[QUOTE=nordi;592131][M]M260543[/M] has a 102.431-bit (31-digit) factor: [URL="https://www.mersenne.ca/M260543"]6833981637847127989838565387041[/URL] (ECM,B1=1000000,B2=162000000,Sigma=3342767857012760)
That's the 9th known factor, Seth_Tr found the 8th factor in May.

[M]M194653[/M] has a 124.361-bit (38-digit) factor: [URL="https://www.mersenne.ca/M194653"]27323512924583858950580510798298798737[/URL] (ECM,B1=3000000,B2=477000000,Sigma=6798721071652496)
That's the [B]10th known factor[/B] :smile:, I found the 9th factor 2 months ago.[/QUOTE]

:showoff::tu:

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