is 2 2338607 - 1
has 703991 decimal digits
takes 0.158 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L987473A1EAB3308Cdouble-checked
PRP69D3861BCD6C7962verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26825.487367.6471%60000001800000001.51648.9722%27.003770.5498%2.9028%
PrimeNet2580.016462.0690%110002000000.00213.0460%0.018563.2243%1.1554%
GPU722620.262764.5161%130002000000.00231.7848%0.265065.1494%0.6333%
Difference+6+25.2246+3.1309%+5987000+179800000+1.5141+7.1875%+26.7387+5.4004%+5.4004%

Known prime factors (1 factor, 90.4 bits, 0.00386751% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
233860716861456447770012485336252632890.446360502137549618479833
11 × 29 × 37 × 97 × 227 × 1387132175369
2021-05-142271387132175369143,724,7667,403.013,827

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.230%
2010-03-01T08:41:00Budannan50000010000000---0.100--4.378%
2018-03-07T06:15:09Sid & AndyHand_In_The_Box600000018000000012---1.516--8.972%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:12Mark RoseManual testing21260--0.066--
2009-01-11T12:43:00Sturle Sundegiovanni.ifi260261--0.066--
2012-05-28T07:42:00Sebastian HornbostelManual testing261262--0.131--
2013-12-04T08:58:00Luigi MorelliManual testing262263--0.420--
2015-03-03T21:35:00VictordeHollanderManual testing263264--0.840--
2015-03-03T21:35:00VictordeHollanderManual testing264265--1.598--
2015-10-25T20:35:19ramgeisManual testing265266--3.195--
2017-06-07T04:04:55Gordon SpenceManual testing266267--6.391--
2019-03-18T11:45:40TJAOIManual testing267268--12.78--


ECM factoring results:

Old Calculation Method

Total ECM effort:12.685 GHz-days
Estimated T-Level:22.554
DigitsB1CurvesCompleteFacMiss
2011000143 / 1001.43023.759%
2550000143 / 2800.51159.952%

New Calculation Method

Total ECM effort:12.685 GHz-days
Estimated T-Level:22.554
DigitsB1CompleteFacMiss
20110005.5000.409%
25500000.50960.111%
302500000.03296.841%
3510000000.00299.850%


ECM Summary

B1B2factorcurvesGHz-days
50000500000014012.42
50000510000030.268


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02T00:00:00ANONYMOUSv4_computers987473A1EAB3308C0.158
2018-05-07T17:29:04kkmrkkblmbrbkold987473A1EAB3308C0.158


PRP results:
dateuseridcompidcofactorsres64PRP
2021-05-16T17:11:22kutensterra
1686145644777001248533625263
69D3861BCD6C7962no


P-1 factor-bounds graph:
B1 = 6000000, B2 = 180000000 (P-1 stage 2)
B1 = 6000000 (P-1 stage 1)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-05-16T17:11:22+00:00