Reserved for MF - Sequence 4788 - Page 136

unconnected · 2012-01-19, 11:13

Running gnfs on c117@i2872.

akruppa · 2012-01-19, 18:06

Doing curves at 11M on the c149. Edit: 44M

jrk · 2012-01-19, 20:39

Quote:

Originally Posted by akruppa

Doing curves at 11M on the c149.

running poly search. I'll post one tonight unless someone finds a factor.

jrk · 2012-01-20, 03:35

Quote:

Originally Posted by jrk

running poly search. I'll post one tonight unless someone finds a factor.

Code:

# sieve with ggnfs lasieve4 I14e on alg side from Q=8M to 30M
# aq4788:2875
n: 44944968120798970101956399260161048307127624608363627768855259786875744937516514253381492976598354377631809096637742242405056022967763594463388725947
# norm 2.165061e-14 alpha -8.021700 e 6.736e-12 rroots 5
skew: 2076131.15
c0: -2724152092669553301350919758264155248
c1:  19148983504629007377598273822658
c2: -6876114514422853669377235
c3: -12263406826598895700
c4:  947045644148
c5:  794352
Y0: -35524959071412568874372278765
Y1:  10439608423446181
rlim: 16000000
alim: 16000000
lpbr: 29
lpba: 29
mfbr: 58
mfba: 58
rlambda: 2.5
alambda: 2.5

LaurV · 2012-01-20, 05:18

Quote:

Originally Posted by Andi47

I'd prefer 2¹*3⁰

2^0*x is even better, for any x except a square... :P

akruppa · 2012-01-20, 13:16

Found 6836077383647882167495637621893086479456936569

Ralf Recker · 2012-01-20, 18:37

********** Factor found in step 2: 4387050301986034667561975512302171805093213

Update - another one:

********** Factor found in step 2: 583358317624551201719447527348636163

Ralf Recker · 2012-01-20, 19:52

Number 3:

Found probable prime factor of 44 digits: 10174073890280464531539919236320115459913679

Ralf Recker · 2012-01-21, 04:33

The sequence tries to imitate 890460 with it's 2^9 · 3^8

:

2^2 · 3^4 after 2^2 · 3^2 and 2^2 · 3.

Now a c136 @ i2883.

Andi47 · 2012-01-21, 06:10

Quote:

Originally Posted by LaurV

2^0*x is even better, for any x except a square... :P

What would it require to get 2^0*x? something like 2²*p²?

Batalov · 2012-01-21, 07:15

Quote:

Originally Posted by Andi47

What would it require to get 2^0*x? something like 2²*p²?

2^mz², m>0.
Example.

2012-01-19, 18:06	#1487
akruppa "Nancy" Aug 2002 Alexandria 2,467 Posts	Doing curves at 11M on the c149. Edit: 44M Last fiddled with by akruppa on 2012-01-19 at 21:26

2012-01-20, 18:37	#1492
Ralf Recker Oct 2010 191 Posts	******** Factor found in step 2: 4387050301986034667561975512302171805093213 Update - another one: ******** Factor found in step 2: 583358317624551201719447527348636163 Last fiddled with by Ralf Recker on 2012-01-20 at 19:26

2012-01-21, 04:33	#1494
Ralf Recker Oct 2010 191 Posts	The sequence tries to imitate 890460 with it's 2^9 · 3^8 : 2^2 · 3^4 after 2^2 · 3^2 and 2^2 · 3. Now a c136 @ i2883. Last fiddled with by Ralf Recker on 2012-01-21 at 04:45 Reason: Removed the links

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2012-01-19, 11:13	#1486
unconnected May 2009 Russia, Moscow 101000100001₂ Posts	Running gnfs on c117@i2872.

2012-01-20, 13:16	#1491
akruppa "Nancy" Aug 2002 Alexandria 2467₁₀ Posts	Found 6836077383647882167495637621893086479456936569

2012-01-20, 19:52	#1493
Ralf Recker Oct 2010 191 Posts	Number 3: Found probable prime factor of 44 digits: 10174073890280464531539919236320115459913679