is 2 15105869 - 1
has 4547320 decimal digits
takes 7.576 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LFECAD50B387BBBEDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.308766.6667%18500044400000.30312.6867%63.611967.5622%0.8956%
PrimeNet2650.483063.0769%6500020000000.12394.1472%0.606964.6082%1.5313%
GPU722697.903365.2174%10000026000000.17182.9964%8.075166.2596%1.0422%
Difference+3+55.4054+1.4493%+85000+1840000+0.1313-0.3097%+55.5368+1.3026%+1.3026%

Known prime factors (1 factor, 76.3 bits, 0.00050492% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15105869913076953639346495179612376.2733022258943326420
22 × 5 × 7 × 21587563880903
2022-02-227215875638809031,627.1855,3141,597,489

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00ANONYMOUSv4_computers1850004440000---0.303--2.687%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-02-22T08:48:38ATHec2-P_110000002900000027P+12376.2732.094


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31T00:00:00Net_Forcev4_computers21257--0.001--
2000-12-31T00:00:00Net_Forcev4_computers21258--0.003--
2001-01-28T00:00:00schazv4_computers21265--0.483--
2014-05-14T07:05:00NesowaManual testing265266--0.495--
2014-05-14T07:05:00NesowaManual testing266267--0.989--
2016-11-16T01:10:14mikrManual testing267268--1.979--
2017-10-08T22:00:39ramgeisManual testing268269--3.958--
2021-06-27T22:13:31lycornManual testing269270--7.915--
2021-09-06T18:03:25SRBaseManual testing270271--15.83--
2021-10-15T18:41:41-Anonymous-Manual testing271272--31.66--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.763 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.763 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.763


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-03-24T00:00:00ANONYMOUSv4_computersFECAD50B387BBBED7.576
2005-09-22T00:00:00ANONYMOUSv4_computersFECAD50B387BBBED7.576


PRP results:
No PRP results for M15105869


P-1 factor-bounds graph:
B1 = 1000000, B2 = 29000000 (P+1 stage 2)
B1 = 1000000 (P+1 stage 1)
B1 = 185000, B2 = 4440000 (P-1 stage 2)
B1 = 185000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-02-22T08:48:38+00:00