is 2 7237141 - 1
has 2178597 decimal digits
takes 1.578 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L7BB109144A62FA4Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273264.309468.4932%1600000016143964200282.885512.6386%547.194972.4752%3.9820%
Target2674.105865.6716%4500010000000.03072.3124%4.136466.4655%0.7938%
Difference+6+260.2036+2.8215%+15955000+16142964200+282.8548+10.3261%+543.0584+6.0097%+3.1882%

Known prime factors (1 factor, 124.5 bits, 0.00172070% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
72371413070404816529147058557045438584930237738124.5302121282987666778261303079101668
22 × 32 × 2633 × 10463 × 11054699 × 11884739 × 16279927		2023-01-0111884739162799272.301e+103.83347.6476

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-12-08T00:00:00ANONYMOUSv4_computers35000358750---0.017--0.707%
2012-07-31T22:15:00Squeeky_SquirrelP4_2600900001620000---0.055--1.434%
2020-02-02T11:22:44storm55103570_Ivy_Bridge385000847000012---0.261--2.836%
2022-12-09T17:26:53yoyorocks1Manual testing160000001614396420038124.530282.93.156565.812.639%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-09-20T00:00:00ANONYMOUSv4_computers21262--0.085--
1998-12-13T00:00:00ANONYMOUSv4_computers21262--0.085--
2001-12-08T00:00:00ANONYMOUSv4_computers21263--0.221--
2013-11-03T11:13:00NesowaManual testing263264--0.271--
2013-11-16T13:36:00David CampeauManual testing264265--0.516--
2015-06-16T01:49:00VictordeHollanderManual testing265266--1.033--
2016-10-14T15:31:34Gordon SpenceManual testing266267--2.065--
2018-07-31T10:55:00ramgeisManual testing267268--4.130--
2020-03-20T12:12:26TJAOIManual testing268269--8.260--
2021-08-19T15:57:56SRBaseManual testing269270--16.52--
2021-08-24T16:13:56SRBaseManual testing270271--33.04--
2021-10-10T08:37:50SRBaseManual testing271272--66.08--
2021-12-25T20:22:10-Anonymous-Manual testing272273--132.2--


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-16T00:00:00ANONYMOUSv4_computers7BB109144A62FA4C1.578
2002-01-08T00:00:00ANONYMOUSv4_computers7BB109144A62FA4C1.578


PRP results:
dateuseridcompidcofactorsres64PRP
2023-01-06T15:33:20Perigbronnlar
30704048165291470585570454385849302377
AA2C2938730CC5D8no


P-1 factor-bounds graph:
B1 = 16000000, B2 = 16143964200 (P-1 stage 2)
B1 = 16000000 (P-1 stage 1)
B1 = 385000, B2 = 8470000 (P-1 stage 2)
B1 = 385000 (P-1 stage 1)
B1 = 90000, B2 = 1620000 (P-1 stage 2)
B1 = 90000 (P-1 stage 1)
B1 = 35000, B2 = 358750 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
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1010
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TF factor-bounds graph:
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Last modified: 2023-01-06T15:33:20+00:00