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markr 2013-12-19 11:09

Nice, cheesehead!

Batalov 2013-12-20 17:43

Se7en
 
Found a factor of 7 ;-)
145309103373453*2^3990-5 is composite: RES64: [[B]00000000000002D9[/B]] (0.0132s+0.0000s)

Now, you'll say who runs pfgw with -f0 and then shares this silliness? (2D9[SUB]hex[/SUB] = 3[SUP]7-1[/SUP])

Well, it is a part of a silly almost-quintuplet:
[URL="http://factordb.com/index.php?query=145309103373453*2%5E3990-5"]145309103373453*2^3990-5[/URL] is 7*p1215
[URL="http://factordb.com/index.php?query=145309103373453*2%5E3990-1"]145309103373453*2^3990-1[/URL] is prime
[URL="http://factordb.com/index.php?query=145309103373453*2%5E3990%2B1"]145309103373453*2^3990+1[/URL] is prime
[URL="http://factordb.com/index.php?query=145309103373453*2%5E3990%2B5"]145309103373453*2^3990+5[/URL] is prime
[URL="http://factordb.com/index.php?query=145309103373453*2%5E3990%2B7"]145309103373453*2^3990+7[/URL] is prime

Uncwilly 2013-12-27 02:53

[QUOTE=Uncwilly;360335][B][COLOR="Red"]120.6 bits [/COLOR][/B] A new personal best!!!!![/QUOTE]
Found a 117 bit on the 23rd.
[QUOTE=Uncwilly;359830]I had one machine find 2 factors in 2 days both P-1 stage 1.
64320973 has a factor of 4171438018009522530410037151 [B]91.8 bits[/B] :shock:[/QUOTE]
And a new personal best for stage 1:
M64680983 has a factor: 14363804976454221186936300663583
103.5 bits, [B][I][FONT="Comic Sans MS"]k[/FONT][/I][/B] = 111035765925621609576777 = 3[SUP]2[/SUP] × 7 × 13 × 739 × 2579 × 6323 × 52057 × 216113
:uncwilly:

Jwb52z 2014-01-09 16:42

P-1 found a factor in stage #1, B1=705000.
UID: Jwb52z/Clay, M69221417 has a factor: 227258439341805150214805809

87.555 bits.

Jwb52z 2014-01-17 14:44

P-1 found a factor in stage #2, B1=705000, B2=14628750.
UID: Jwb52z/Clay, M69160561 has a factor: 6801529600136142988183258993

92.458 bits.

Jwb52z 2014-01-18 16:40

P-1 found a factor in stage #2, B1=705000, B2=14628750.
UID: Jwb52z/Clay, M69408289 has a factor: 118214961583770382650313

76.646 bits

TheJudger 2014-01-19 16:28

Good start in factoring season 2014:

P-1 found a factor in stage #1, B1=670000.
M65508869 has a factor: 175927641847360083407185992694635239625947165412379183 (176.88 bits)

I'm not 100% sure but I think this is my biggest "regular P-1 double factor" so far.

f[SUB]1[/SUB] = 12348810633422410377735721 (83.35 bits)
k[SUB]1[/SUB] = 94252967742599940 = 2^2 * 3 * 5 * 193 * 3407 * 21839 * 109391

f[SUB]2[/SUB] = 14246525197431311465890025623 (93.52 bits)
k[SUB]2[/SUB] = 108737377204843144719 = 3^3 * 13 * 17 * 19 * 23 * 8597 * 33317 * 145589

Oliver

P.S. I'll throw this factor back into the sea using it as bait for [I]the big one[/I].

YuL 2014-01-22 10:39

M67983497 has factor
 
[Tue Jan 21 07:56:58 2014]
P-1 found a factor in stage #1, B1=615000.
[URL="http://www.mersenne.ca/exponent.php?exponentdetails=67983497"]M67983497[/URL] has a factor: 1753010986832384134537496993
90.5 bits
k = 2^4 × 883 × 38839 × 43889 × 535361

flashjh 2014-01-30 13:46

Got a personal best:

[URL="http://www.mersenne.ca/exponent/65349397"]65349397[/URL]

factor = 147198755735760872609938849583897167
k = 1126244177400450019530699339
3 × 7 × 43 × 953 × 14389 × 14951 × 539993 × 11265823
bits: 116.825

cheesehead 2014-02-06 11:03

Again in the <1M range:

Seven ECM curves at B1=50000,B2=5000000 found three factors of M670583:
5688983930597081, 27133635573130199 and 1286644266245972687
to go with the smaller three factors previously known.

Miszka 2014-02-10 01:50

My personal best
M31051 has a factor: 24523881623890845010007531389564120430998338703 (154,1 bits)
ECM found a factor in curve #24, stage #2
Sigma=3677350809829694, B1=3000000, B2=300000000


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