is 2 15106661 - 1
has 4547559 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-L0A224763DF8F7180double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.305466.6667%36000096300000.62913.5264%63.934567.8421%1.1755%
PrimeNet2650.482963.0769%6500020000000.12394.1472%0.606964.6082%1.5313%
GPU722697.902965.2174%10000026000000.17182.9964%8.074766.2596%1.0422%
Difference+3+55.4025+1.4493%+260000+7030000+0.4573+0.5299%+55.8598+1.5825%+1.5825%

Known prime factors (1 factor, 84.5 bits, 0.00055952% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15106661278247651151430689043878872684.525920943586247916363
3 × 11 × 1481 × 659689 × 28564379
2022-02-2365968928564379279,7241.58532.1138

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-16T00:00:00ANONYMOUSv4_computers1550001123750---0.151--1.843%
2019-03-27T16:54:18harleei5-5250U_1600360000963000012---0.629--3.526%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-02-23T21:17:01ATHec2-P_110000002900000027P-12684.5252.094


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--
2001-04-21T00:00:00ANONYMOUSv4_computers21265--0.483--
2014-05-14T07:05:00NesowaManual testing265266--0.495--
2014-05-14T07:05:00NesowaManual testing266267--0.989--
2016-11-19T00:10:21mikrManual testing267268--1.979--
2017-10-08T22:00:40ramgeisManual testing268269--3.957--
2021-06-27T22:13:34lycornManual testing269270--7.915--
2021-09-08T15:11:55SRBaseManual testing270271--15.83--
2021-10-09T10:08:32-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)
2002-07-27T00:00:00ANONYMOUSv4_computers0A224763DF8F71807.576
2002-09-22T00:00:00ANONYMOUSv4_computers350E466DA4D736__7.576
2005-11-13T00:00:00BCGv4_computers0A224763DF8F71807.576


PRP results:
No PRP results for M15106661


P-1 factor-bounds graph:
B1 = 1000000, B2 = 29000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 360000, B2 = 9630000 (P-1 stage 2)
B1 = 360000 (P-1 stage 1)
B1 = 155000, B2 = 1123750 (P-1 stage 2)
B1 = 155000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-02-23T21:17:01+00:00