is 2 9691861 - 1
has 2917541 decimal digits
takes 2.827 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L4891C2DF864A5275double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2686.150064.7059 %555000174825000.62485.8435 %6.774766.7683 %
Target2686.150064.7059 %6500075000000.19882.5553 %6.348865.6077 %
Difference---+490000+9982500+0.4260+3.2882%+0.4260+1.1605 %

Known prime factors (1 factor, 86.0 bits, 0.00088769% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
9691861792001964950333917653126712686.0344085912731055129235
32 × 5 × 71 × 787 × 121721 × 13349899
2018-10-24121721133498992,840,2010.35630.5745

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-06-09ANONYMOUSv4_computers1000001000000--0.0632.501%
2018-10-24Squeeky_Squirreli5-5250U_1600555000174825001222686.0340.6255.843%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-06-26ANONYMOUSv4_computers212640.203
2013-08-28NesowaManual testing2642650.386
2015-05-02VictordeHollanderManual testing2652660.771
2016-10-10snme2pm1Manual testing2662684.626


ECM factoring results:
Total ECM effort:1.331 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000031.331


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-04-12davidcrossv4_computers1986E920BE57BB2F2.827
2001-08-24ANONYMOUSv4_computers4891C2DF864A52752.827
2003-08-31ANONYMOUSv4_computers4891C2DF864A52752.827


PRP results:
dateuseridcompidcofactorsres64
2019-10-13Niels_Mache_NextcloudSuperDry-X
79200196495033391765312671
C35E3D8305D7F1A5
2020-12-23Oliver KruseIOS-5
79200196495033391765312671
C35E3D8305D7F1A5


CERT results:
dateuseridcompid
2020-12-23Chun sung soosangsoo_Lee


P-1 factor-bounds graph:
B1 = 555000, B2 = 17482500 (P-1 stage 2)
B1 = 555000 (P-1 stage 1)
B1 = 100000, B2 = 1000000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
268
266
265
264
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
280
290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00