is 2 992863 - 1
has 298882 decimal digits
takes 0.024 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26729.927570.1493%2000000500000000.16236.7380%30.089872.1606%2.0113%
PrimeNet2400.000050.0000%90004000000.001124.0303%0.001162.0152%12.0152%
GPU722440.000054.5455%160006500000.001818.4632%0.001862.9378%8.3924%
Difference+23+29.9275+15.6038%+1984000+49350000+0.1605-11.7253%+30.0880+9.2228%+9.2228%

Known prime factors (2 factors, 133.0 bits, 0.01339551% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
992863697564884947390493912065.91935128959632265
3 × 5 × 2341930642151
2007-09-16523419306421517.91024,486.68,379.6
9928631560005669779404797992167.08078560973154373
3079 × 25515093587
2016-10-1430792551509358754.12348.88191.295

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
9928631088205175556947355493648455473569875240941132.999
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-08T00:00:00ANONYMOUSv4_computers2000200000---0.000--0.217%
2002-03-03T00:00:00ANONYMOUSv4_computers4096409600---0.001--0.459%
2002-04-28T00:00:00ANONYMOUSv4_computers163841638400---0.004--1.329%
2002-08-10T00:00:00ANONYMOUSv4_computers327683276800---0.007--1.983%
2003-01-25T00:00:00ANONYMOUSv4_computers655366553600---0.015--2.779%
2003-09-09T00:00:00ANONYMOUSv4_computers13107213107200---0.029--3.701%
unknown200000050000000---0.162--6.738%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-07-12T00:00:00ANONYMOUSv4_computers21255--0.005--
2000-10-15T00:00:00ANONYMOUSv4_computers21256--0.010--
2001-12-01T00:00:00ANONYMOUSv4_computers21257--0.019--
2003-06-30T00:00:00ANONYMOUSv4_computers21258--0.039--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.237 GHz-days
Estimated T-Level:25.344
DigitsB1CurvesCompleteFacMiss
2011000325 / 1003.2503.815%
2550000325 / 2801.16131.261%
3025000044 / 6400.06993.351%

New Calculation Method

Total ECM effort:14.237 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002797.928
50000500000020.057
25000025000000446.252


Lucas-Lehmer results:
No L-L results for M992863


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T15:07:13Oliver KruseGTX-0
69756488494739049391
156000566977940479799
B3A5B34109B83752no
2017-10-05T21:00:49Oliver KruseManual testing
69756488494739049391
156000566977940479799
B3A5B34109B837__no
2017-10-15T12:24:42Oliver KruseGTX-3
69756488494739049391
156000566977940479799
B3A5B34109B837__no
2017-12-24T02:01:41ATHec2-1xf
69756488494739049391
156000566977940479799
B3A5B34109B837__no
2020-04-25T01:30:39Oliver KruseAddPrpType5
69756488494739049391
156000566977940479799
43B873CB6A1B8F__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 50000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
B1 = 4096, B2 = 409600 (P-1 stage 2)
B1 = 16384 (P-1 stage 1)
B1 = 2000, B2 = 200000 (P-1 stage 2)
B1 = 4096 (P-1 stage 1)
B1 = 2000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-04-25T01:30:39+00:00