is 2 15053729 - 1
has 4531624 decimal digits
takes 7.209 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD81EA1FB5929FCA5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273127.067867.1233%30000060000000.42402.7922%127.491868.0413%0.9180%
PrimeNet2650.484663.0769%6500020000000.11834.1451%0.603064.6074%1.5305%
GPU722697.930765.2174%10000026000000.16402.9949%8.094766.2591%1.0417%
Difference+4+119.1371+1.9059%+200000+3400000+0.2599-0.2027%+119.3970+1.7822%+1.7822%

Known prime factors (1 factor, 80.7 bits, 0.00053587% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1505372919218766013353983004300872580.66963833904587208867
3 × 331 × 701 × 5851 × 15673069
2022-05-2658511567306929,6700.59681.1075

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-03T00:00:00ANONYMOUSv4_computers225000225000---0.156--0.904%
2015-07-12T22:38:00ThaManual testing3000006000000---0.424--2.792%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-05-26T17:19:41ATHec2-P_110000002900000027P-12580.6692.094


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31T00:00:00Net_Forcev4_computers21257--0.001--
2001-06-23T00:00:00ANONYMOUSv4_computers21265--0.485--
2014-06-11T15:22:00NesowaManual testing265266--0.496--
2014-06-11T15:22:00NesowaManual testing266267--0.993--
2016-02-07T17:20:07mikrManual testing267268--1.986--
2017-10-04T12:12:47ramgeisManual testing268269--3.971--
2020-07-14T05:31:54YxinityManual testing269270--7.942--
2021-09-05T07:10:56SRBaseManual testing270271--15.88--
2021-10-09T17:49:43-Anonymous-Manual testing271272--31.77--
2022-03-06T06:09:01Markus K.GPU72_TF272273--63.54--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.728 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.728 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-05-25T00:00:00ANONYMOUSv4_computersD81EA1FB5929FCA57.209
2006-06-13T00:00:00ebravickv4_computersD81EA1FB5929FCA57.209


PRP results:
No PRP results for M15053729


P-1 factor-bounds graph:
B1 = 1000000, B2 = 29000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 225000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-05-26T17:19:41+00:00