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Old 2022-07-28, 04:59   #89
frmky
 
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2_1419m1 is done.


Last fiddled with by frmky on 2022-07-28 at 05:04
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Old 2022-07-28, 06:55   #90
bur
 
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79*6581e-4;3*2539e-3

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Regarding TD and its influence on the matrix. I accidentally omitted the TD option when doing 9p8_277 so I can compare the default, I think it's 90, and TD 120.

TD default: 21001871 x 21002097 (192 h)
TD 120: 19133102 x 19133327 (184 h)
TD 130: too few cycles
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Old 2022-07-30, 21:27   #91
RichD
 
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Default 143__553_17m1 factored




Greg was kind enough to get this number "off the board". The low amount of quality relations at higher Q was diminishing. The high dup rate for an octic was not considered.

He used an A100 (40GB) card to solve a 34.8M matrix (TD=100) in under 2.5 hours.

The joys of having a souped up laptop. Hehehe

BTW, The C233 splits as p79 * p154 per the above.
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Old 2022-07-30, 22:27   #92
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Quote:
Originally Posted by RichD View Post



Greg was kind enough to get this number "off the board". The low amount of quality relations at higher Q was diminishing. The high dup rate for an octic was not considered.
Quote:
Originally Posted by RichD View Post
Trial sieving 5K blocks.
Code:
  Q  Yield
 20M 10597
 60M  9529
100M 11131
200M  6102
300M  4412
This particular octic polynomial is the poster child for normalizing your yields when test-sieving. The number of special-Q in a 5k range can deviate a lot from the expected value, because the rule for how many special-Q a particular prime produces is "8 if it's 1 or -1 mod 17, and 0 otherwise". In other words, yield in a given range is mainly determined by how many primes of the form +-1 mod 17 are in that range, and even over 5k or 10k this can vary a lot - hence those odd-looking yield values if you don't normalize.
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Old 2022-07-31, 00:27   #93
frmky
 
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Quote:
Originally Posted by RichD View Post
He used an A100 (40GB) card to solve a 34.8M matrix (TD=100) in under 2.5 hours.
Eight A100s solved it in just under 3 hours.
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Old 2022-07-31, 17:36   #94
Batalov
 
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Default 2,1416+ is done

2,1416+ cofactor =
Code:
p110 factor: 32312139386459660237589835506395782331854721499061954474461527504052156188529138203172395312834444925463648513
p132 factor: 113549775564110519212519230119252103326442212816541139961498454959756524255414502563846731643283454715786229269884666432928283316193
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Old 2022-08-01, 13:15   #95
kruoli
 
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7489_71m1 is done!
Code:
p101 factor: 27530826475670275622162008779892833745703231215227145120427912229703235183770514325609391559000511139
p171 factor: 588717420178415435308735103426674792423843521937976223328136026853140625219123716856817602288311485884575045103657394565629111201231704476330855744890496790420001125000909
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Old 2022-08-01, 15:46   #96
chris2be8
 
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Quote:
Originally Posted by bur View Post
Regarding TD and its influence on the matrix. I accidentally omitted the TD option when doing 9p8_277 so I can compare the default, I think it's 90, and TD 120.

TD default: 21001871 x 21002097 (192 h)
TD 120: 19133102 x 19133327 (184 h)
TD 130: too few cycles
The default is 70. From gnfs/filter/filter.c:
Code:
#define DEFAULT_TARGET_DENSITY 70.0
I don't think target_density makes much difference unless you have a *large* matrix to solve.
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Old 2022-08-01, 16:02   #97
charybdis
 
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Quote:
Originally Posted by chris2be8 View Post
The default is 70. From gnfs/filter/filter.c:
Code:
#define DEFAULT_TARGET_DENSITY 70.0
Depends how old your msieve is...

Code:
Diff of /trunk/gnfs/filter/filter.c [r1022] .. [r1023] (dated 19 Aug 2018)

--- a/trunk/gnfs/filter/filter.c
+++ b/trunk/gnfs/filter/filter.c
@@ -156,7 +156,7 @@
    average matrix column (may be overriden if you know
    what you are doing) */
 
-#define DEFAULT_TARGET_DENSITY 70.0
+#define DEFAULT_TARGET_DENSITY 90.0
 
 static uint32 do_merge(msieve_obj *obj, filter_t *filter, 
 			merge_t *merge, double target_density) {
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Old 2022-08-03, 15:38   #98
chris2be8
 
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@bur, please check your gnfs/filter/filter.c to see what DEFAULT_TARGET_DENSITY you have.
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Old 2022-08-04, 07:42   #99
bur
 
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9p8_277 is done.

Code:
p71 factor:
15049216317836517294600907995288190450795051840238103964985359740395657
p169 factor:
3185592662098825967983265894144434557976409154116799172820853287730067001405617255022851142961676299096749391251725784426985066413710058020578188751280278848998017389881
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