is 2 15100091 - 1
has 4545581 decimal digits
takes 7.573 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L797592D537F53600double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.333066.6667%30000060000000.44403.1069%63.777067.7023%1.0356%
PrimeNet2650.483263.0769%6500020000000.12394.1469%0.607164.6081%1.5312%
GPU722697.906465.2174%10000026000000.17182.9962%8.078166.2596%1.0422%
Difference+3+55.4266+1.4493%+200000+3400000+0.2722+0.1106%+55.6988+1.4427%+1.4427%

Known prime factors (1 factor, 83.1 bits, 0.00055061% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15100091106780256734062053083516812683.143353574878237694240
25 × 3 × 5 × 439 × 360977 × 4648321
2022-02-133609774648321239,2420.43240.5342

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-03T00:00:00ANONYMOUSv4_computers225000225000---0.164--1.032%
2016-08-09T01:56:26ThaManual testing300000600000012---0.444--3.107%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-02-13T22:41:20ATHec2-P_110000002900000027P-12683.1432.094


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--
2001-01-14T00:00:00ANONYMOUSv4_computers21264--0.236--
2001-01-14T00:00:00ANONYMOUSv4_computers21265--0.483--
2014-05-14T07:04:00NesowaManual testing265266--0.495--
2014-05-14T07:04:00NesowaManual testing266267--0.990--
2016-11-04T22:15:39mikrManual testing267268--1.980--
2017-10-08T22:00:37ramgeisManual testing268269--3.959--
2021-06-27T22:13:18lycornManual testing269270--7.918--
2021-09-03T15:08:59SRBaseManual testing270271--15.84--
2021-10-15T18:41:28-Anonymous-Manual testing271272--31.67--


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)
2002-09-14T00:00:00Team_Deutschlandv4_computers797592D537F536007.573
2005-11-01T00:00:00ANONYMOUSv4_computers797592D537F536007.573


PRP results:
No PRP results for M15100091


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: 2022-02-13T22:41:20+00:00