is 2 3425893 - 1
has 1031297 decimal digits
takes 0.360 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-
PRPF36F52D843E08701verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26934.848468.1159%10000001266688501.19506.9893%36.043470.3444%2.2285%
PrimeNet2600.044863.3333%140002800000.00432.8511%0.049264.3787%1.0454%
GPU722641.038965.6250%190003200000.00541.8218%1.044366.2512%0.6262%
Difference+5+33.8094+2.4909%+981000+126348850+1.1896+5.1676%+34.9990+4.0932%+4.0932%

Known prime factors (1 factor, 75.7 bits, 0.00220834% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3425893594957439095685529196472375.6558683246077675011
73 × 118948576406507
2021-03-20731189485764065072,790.0986,9391,843,328

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-06T10:50:00Carsten Kossendeyleela15000210000---0.004--0.698%
2011-10-30T07:53:00harleeP4_260060000945000---0.016--1.663%
2014-07-18T01:20:00Jocelyn LaroucheManual testing7873578735---0.012--0.652%
2014-09-13T14:08:00HBendtzHAL900750000010000000---0.155--4.159%
2022-04-09T09:24:21Jocelyn LaroucheManual testing10000001000000---0.152--2.308%
2022-04-10T15:21:25Jocelyn LaroucheManual testing1000000126668850---1.195--6.989%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:29Mark RoseManual testing21260--0.045--
2009-03-24T06:24:00S485122USB-A260261--0.045--
2011-07-24T20:25:00Carsten KossendeyManual testing261262--0.090--
2012-08-18T15:31:00GrunwalderGIMPManual testing21263--0.466--
2016-02-23T16:29:29Mark RoseManual testing262263--0.287--
2015-02-07T18:04:00VictordeHollanderManual testing263264--0.573--
2015-02-07T18:04:00VictordeHollanderManual testing264265--1.091--
2015-04-11T09:16:00Gordon SpenceManual testing265266--2.181--
2017-02-05T22:59:56Gordon SpenceManual testing266267--4.363--
2018-11-12T14:47:32TJAOIManual testing267268--8.725--
2020-12-30T17:06:32axnManual testing268269--17.45--


ECM factoring results:

Old Calculation Method

Total ECM effort:5.285 GHz-days
Estimated T-Level:1.800
DigitsB1CurvesCompleteFacMiss
201100036 / 1000.36069.641%
255000036 / 2800.12987.915%

New Calculation Method

Total ECM effort:5.285 GHz-days
Estimated T-Level:1.800
DigitsB1CompleteFacMiss
20110001.16131.308%
25500000.10590.036%
302500000.00699.356%


ECM Summary

B1B2factorcurvesGHz-days
500005000000152.202
500005000000213.083


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-08T00:00:00Klaas de Jongv4_computers862051820CFF55__0.360


PRP results:
dateuseridcompidcofactorsres64PRP
2021-03-22T05:19:21Luigi Morelli9800
59495743909568552919647
F36F52D843E08701no


P-1 factor-bounds graph:
B1 = 1000000, B2 = 126668850 (P-1 stage 2)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 60000, B2 = 945000 (P-1 stage 2)
B1 = 78735 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
B1 = 15000, B2 = 210000 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-10T15:21:25+00:00