is 2 5066239 - 1
has 1525090 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-LE6154D9B5AAE97C6double-checked
PRPAC3C501285D48B5Dverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272188.766068.0556%1500000450000000.77784.9533%189.543869.6379%1.5823%
PrimeNet2610.060662.2951%220005000000.00973.4057%0.070363.5792%1.2841%
GPU722651.440164.6154%340007000000.01412.4214%1.454265.4722%0.8568%
Difference+7+187.3259+3.4402%+1466000+44300000+0.7637+2.5319%+188.0896+4.1657%+4.1657%

Known prime factors (1 factor, 90.7 bits, 0.00178961% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
506623919644164736988800127314869212890.666193873253285018730140
22 × 5 × 617 × 953 × 16485792820507
2021-11-089531648579282050778,631,790180,524337,169

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-06-29T00:00:00ANONYMOUSv4_computers25000281250---0.008--0.631%
2001-05-20T00:00:00ANONYMOUSv4_computers25000231250---0.007--0.591%
2009-08-12T04:27:00harleeP4_2600600001065000---0.023--1.236%
2017-07-03T10:27:37mikrS06315000004500000012---0.778--4.953%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-11-08T01:59:27ATHec2-P_125000009000000027P+12890.6661.881


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-06-07T00:00:00ANONYMOUSv4_computers21261--0.061--
2008-12-28T20:24:00Sturle Sundeantonov.ifi261262--0.061--
2009-08-08T04:05:00GrunwalderGIMPManual testing21263--0.315--
2016-02-23T16:39:08Mark 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--
2016-05-22T18:45:47Gordon SpenceManual testing266267--2.950--
2018-06-11T12:29:31ramgeisManual testing267268--5.900--
2021-01-25T11:17:43TJAOIManual testing268269--11.80--
2021-04-01T15:52:17-Anonymous-Manual testing269270--23.60--
2021-04-01T15:52:17-Anonymous-Manual testing270271--47.20--
2021-04-03T17:56:48-Anonymous-Manual testing271272--94.40--


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)
1998-08-09T00:00:00ANONYMOUSv4_computersEA9CA14938811D__0.702
2000-07-03T00:00:00ANONYMOUSv4_computersE6154D9B5AAE97C60.702
2001-06-17T00:00:00ANONYMOUSv4_computersE6154D9B5AAE97C60.702


PRP results:
dateuseridcompidcofactorsres64PRP
2021-11-08T03:50:02ATHec2-PRPCF
1964416473698880012731486921
AC3C501285D48B5Dno


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 = 25000, B2 = 281250 (P-1 stage 2)
B1 = 25000, B2 = 231250 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-11-08T03:50:02+00:00