is 2 307381 - 1
has 92531 decimal digits
takes 0.002 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
Actualunknown50000500000.000515.0048%0.000515.0048%15.0048%
PrimeNet2400.000052.5000%3200900000.000115.6184%0.000159.9188%7.4188%
GPU722440.000056.8182%55001500000.000111.4321%0.000161.7548%4.9366%
Difference-440.0000-56.8182%+44500-100000+0.0004+3.5727%+0.0004-46.7500%-46.7500%

Known prime factors (2 factors, 115.7 bits, 0.03765468% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3073811844287720.8153
3
-134.547e-131.143e-82.098e-8
307381377042880799434114610771372492994.92961331520295567083621104
24 × 171053 × 22409545687435723
2021-10-04171053224095456874357231.470e+1012,589,18523,513,091

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
3073816953752835009459449331557022554646335115.743
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-02-06T16:51:56Lisander ViaeneManual testing5000050000-
skipped known factor: 1844287
--0.001--9.789%


Trial Factoring results:
No TF results for M307381


ECM factoring results:

Old Calculation Method

Total ECM effort:16.609 GHz-days
Estimated T-Level:27.711
DigitsB1CurvesCompleteFacMiss
2011000628 / 1006.2800.182%
2550000628 / 2802.24310.573%
30250000347 / 6400.54258.123%

New Calculation Method

Total ECM effort:16.609 GHz-days
Estimated T-Level:27.711
DigitsB1CompleteFacMiss
201100037.9810.000%
25500005.0920.615%
302500000.51459.839%
3510000000.04196.018%
4030000000.00399.735%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002812.145
250000250000001445.496
250000367500002008.835
2500003675000030.133


Lucas-Lehmer results:
No L-L results for M307381


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T15:56:12Oliver KruseOllaptop
1844287
4F9413FA1DD493__no
2017-09-22T20:37:30Oliver KruseManual testing
1844287
4F9413FA1DD493__no
2017-10-12T22:45:53Oliver KruseGTX-04F9413FA1DD493__no
2017-12-11T10:26:12ATHxps
1844287
4F9413FA1DD493__no
2020-04-18T07:19:56Oliver KruseAddPrpType5
1844287
BEF792DB44F544__no
2021-10-04T14:26:19H Michaelson
1844287
37704288079943411461077137249
BEF792DB44F5448Fno


P-1 factor-bounds graph:
B1 = 50000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
1016
1017
TF factor-bounds graph:
220
230
240
250
260
270
280
290
2100
Last modified: 2022-02-06T16:51:56+00:00