is 2 9570943 - 1
has 2881141 decimal digits
takes 2.792 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L80F04A86FB08795Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2673.104664.1791%11500021850000.09633.4679%3.200965.4213%1.2422%
PrimeNet2640.371962.5000%4000011000000.04133.5046%0.413263.8142%1.3142%
GPU722686.227764.7059%6000014000000.05632.4669%6.283965.5765%0.8707%
Difference-1-3.1231-0.5268%+55000+785000+0.0401+1.0010%-3.0830-0.1552%-0.1552%

Known prime factors (1 factor, 71.5 bits, 0.00074663% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
957094332458109820046964749212271.459169565892410220
22 × 3 × 5 × 41 × 182549 × 377593
2014-10-1518254937759388.2390.08170.1571

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-06-06T00:00:00ANONYMOUSv4_computers50000850000---0.040--2.379%
2013-01-19T13:13:00NesowaEPC1150002185000---0.096--3.468%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-06-06T00:00:00ANONYMOUSv4_computers21264--0.372--
2013-08-31T06:38:00David CampeauManual testing264265--0.390--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.887 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:0.887 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020.887


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-04-19T00:00:00ANONYMOUSv4_computers80F04A86FB08795F2.792
2003-06-06T00:00:00ANONYMOUSv4_computers80F04A86FB08795F2.792


PRP results:
dateuseridcompidcofactorsres64PRP
2019-09-26T11:36:58mnd9f4b
3245810982004696474921
8FF995447BB2B7__no
2020-12-12T10:20:34Richard Thomasdjinn.pc
3245810982004696474921
8FF995447BB2B756no


P-1 factor-bounds graph:
B1 = 115000, B2 = 2185000 (P-1 stage 2)
B1 = 115000 (P-1 stage 1)
B1 = 50000, B2 = 850000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
267
265
264
250
260
270
280
290
2100
Last modified: 2020-12-12T10:20:34+00:00