is 2 260387 - 1
has 78385 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
Actualunknown30000000100358126969105,417.947373.0599%5,417.947373.0599%73.0599%
PrimeNet2400.000055.0000%2800700000.000114.4057%0.000161.4826%6.4826%
GPU722440.000059.0909%50001200000.000110.5543%0.000163.4086%4.3177%
Difference-440.0000-59.0909%+29995000+10035812576910+5,417.9472+62.5055%+5,417.9472+9.6513%+68.7422%

Known prime factors (2 factors, 151.2 bits, 0.05807705% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
260387306215113928.190588
22 × 3 × 72
-49491.548e-104.855e-79.881e-7
2603871089588219462126483163102795411126159938123.03520922477302287105023735877663077
3 × 7 × 29 × 137447 × 1219619 × 5374379 × 38133623699
2022-05-025374379381336236996.017e+1120.63638.449

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
260387333648379746063860262082119927433878511034568746151.225
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-09-16T07:41:13Oliver KruseOllaptop30000000300000000024-
skipped known factor: 306215113
--1.901--44.101%
2022-05-02T17:37:53Oliver KruseThreadripper-PC300000001003581269691038123.0355,4180.00410,83663.207%


Trial Factoring results:
No TF results for M260387


ECM factoring results:
Total ECM effort:12.145 GHz-days
Estimated T-Level:27.443
DigitsB1CompleteFacMiss
201100035.6800.000%
25500004.8430.789%
302500000.48961.348%
3510000000.03996.172%
4030000000.00399.744%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002812.049
250000250000002127.728
2500003425000070.287
2500003525000070.290
2500003642819170.294
2500003650000070.294
25000038392042140.601
25000038500000140.602


Lucas-Lehmer results:
No L-L results for M260387


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T08:21:58Oliver KruseOllaptop
306215113
06F8C6DB0EFCD7__no
2017-09-22T10:06:51Oliver KruseManual testing
306215113
06F8C6DB0EFCD7__no
2017-10-12T17:29:15Oliver KruseGTX-106F8C6DB0EFCD7__no
2017-11-06T17:30:23kkmrkkblmbrbkc4.xlarge
306215113
06F8C6DB0EFCD7__no
2020-04-17T21:08:44Oliver KruseAddPrpType5
306215113
57F147E65A9A86__no
2022-05-03T07:43:27LordJuliusWhiteBox
306215113
10895882194621264831631027954111261599
57F147E65A9A86DDno
2022-05-03T09:36:34Oliver KruseServer-Phi
306215113
10895882194621264831631027954111261599
57F147E65A9A86DDno


P-1 factor-bounds graph:
B1 = 30000000, B2 = 10035812696910 (P-1 stage 2)
B1 = 30000000, B2 = 3000000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-09-16T03:19:34+00:00