is 2 5065607 - 1
has 1524900 decimal digits
takes 0.702 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP28197ADB58FF2540verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272188.789568.0556%1500000450000000.77784.9532%189.567469.6378%1.5823%
PrimeNet2610.060662.2951%220005000000.00973.4057%0.070363.5792%1.2841%
GPU722651.440264.6154%340007000000.01412.4213%1.454465.4722%0.8568%
Difference+7+187.3493+3.4402%+1466000+44300000+0.7637+2.5319%+188.1130+4.1657%+4.1657%

Known prime factors (1 factor, 87.2 bits, 0.00172201% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
50656071815269449642566350010436012787.23017917590622827297400
23 × 52 × 79 × 50873 × 22291288561
2021-11-0650873222912885616,803,463244.11455.90

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2006-01-15T00:00:00Jocelyn Larouchev4_computers5000050000---0.010--0.326%
2009-08-11T21:53:00harleeP4_2600600001065000---0.023--1.236%
2017-06-30T09:43:33mikrS06215000004500000012---0.778--4.953%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-11-06T17:00:51ATHec2-P_125000009000000027P+12787.2301.881


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers21261--0.061--
2008-12-28T13:16:00Sturle Sundeantonov.ifi261262--0.061--
2009-08-08T04:05:00GrunwalderGIMPManual testing21263--0.315--
2016-02-23T16:39:07Mark RoseManual testing262263--0.194--
2014-12-14T14:43:00VictordeHollanderManual testing263264--0.388--
2014-12-14T14:43:00VictordeHollanderManual testing264265--0.738--
2015-08-02T05:19:00snme2pm1Manual testing265266--1.475--
2016-05-22T18:45:46Gordon SpenceManual testing266267--2.950--
2018-06-11T12:29:31ramgeisManual testing267268--5.901--
2021-01-25T11:17:45TJAOIManual testing268269--11.80--
2021-04-01T10:40:42-Anonymous-Manual testing269270--23.60--
2021-04-01T10:40:42-Anonymous-Manual testing270271--47.21--
2021-04-03T10:35:15-Anonymous-Manual testing271272--94.41--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.897 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.897 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.29074.802%
25500000.02697.410%
302500000.00299.839%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.897


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28T00:00:00ANONYMOUSv4_computers33C22BF1CD0136__0.702
2000-04-27T00:00:00ANONYMOUSv4_computersCD28ACFD5ADED1__0.702


PRP results:
dateuseridcompidcofactorsres64PRP
2021-11-06T18:24:01ATHec2-PRPCF
181526944964256635001043601
28197ADB58FF2540no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 90000000 (P+1 stage 2)
B1 = 1500000, B2 = 45000000 (P-1 stage 2)
B1 = 2500000 (P+1 stage 1)
B1 = 1500000 (P-1 stage 1)
B1 = 60000, B2 = 1065000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-06T18:24:01+00:00