is 2 1055471 - 1
has 317729 decimal digits
takes 0.031 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26728.152368.6567%1000000010000000002.747811.6648%30.900172.3128%3.6561%
PrimeNet2560.009162.5000%4500650000.00032.0099%0.009463.2537%0.7537%
GPU722600.145565.0000%4500190000.00020.6341%0.145765.2219%0.2219%
Difference+7+28.0068+3.6567%+9995500+999981000+2.7476+11.0307%+30.7544+7.0909%+7.0909%

Known prime factors (2 factors, 171.3 bits, 0.01622507% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10554713187906104817931548.180151018176
26 × 3 × 786553
-647865536.810e-50.00180.0034
10554711117287196633716059457566533537499123338123.0715292837020788425543939940242496
26 × 17 × 31 × 41 × 12757 × 2980799 × 6560767 × 15341867
2021-07-296560767153418671.692e+110.30250.5738

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
105547135618066749835343948902186577624415628390452811207
69
52171.251
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T18:59:42alpertronManual testing3000001000000012---0.036--4.093%
2021-07-29T22:59:53ViliamF310000000100000000038123.0712.7480.0635.49611.665%


Trial Factoring results:
Exponent "1055471" not found


ECM factoring results:

Old Calculation Method

Total ECM effort:17.538 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:17.538 GHz-days
Estimated T-Level:25.344
DigitsB1CompleteFacMiss
201100012.7310.000%
25500001.34925.941%
302500000.10889.793%
3510000000.00799.295%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002819.84
25000025000000447.701


Lucas-Lehmer results:
Exponent "1055471" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T20:52:36Oliver KruseGTX-2
318790610481793
EE1034C9AF2586__no
2017-10-16T00:50:45Oliver KruseThreadripper
318790610481793
EE1034C9AF2586__no
2017-12-28T13:58:56ATHec2-1xf
318790610481793
EE1034C9AF2586__no
2021-07-29T23:35:14ViliamF3
318790610481793
11172871966337160594575665335374991233
9899C80F1B7667__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 1000000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
100
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104
105
106
107
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2021-07-29T23:35:14+00:00