is 2 5553269 - 1
has 1671701 decimal digits
takes 0.877 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L30739F176EF901E0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.350765.6716%6500011212500.02812.4659%5.378866.5181%0.8465%
PrimeNet2620.110662.9032%240005500000.01213.1664%0.122764.0778%1.1746%
GPU722662.659465.1515%340007000000.01612.1571%2.675565.9032%0.7517%
Difference+1+2.6913+0.5201%+31000+421250+0.0120+0.3088%+2.7033+0.6149%+0.6149%

Known prime factors (1 factor, 83.4 bits, 0.00150193% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5553269128150480167127807595469432683.4061153829214532267459
1217303 × 947857036853
2015-06-251217303947857036853537,45211,82522,086

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-06-06T07:41:00Carsten Kossendeyleela25000356250---0.010--1.445%
2010-11-25T15:36:00Squeeky_SquirrelP4_2600650001121250---0.028--2.466%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-02-11T05:10:00GrunwalderGIMPManual testing262263--0.177--
2014-12-14T20:34:00NesowaManual testing263264--0.354--
2014-12-15T04:13:00monstManual testing264265--0.673--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.201 GHz-days
Estimated T-Level:0.250
DigitsB1CurvesCompleteFacMiss
20110005 / 1000.05095.099%
25500005 / 2800.01898.227%

New Calculation Method

Total ECM effort:1.201 GHz-days
Estimated T-Level:0.250
DigitsB1CompleteFacMiss
20110000.16185.104%
25500000.01598.553%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.720
50000500000020.480


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-09-23T00:00:00ANONYMOUSv4_computers30739F176EF901E00.877


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T19:27:20kkmrkkblmbrbkManual testing
12815048016712780759546943
7B2D0D561D3F30__no
2018-07-07T23:56:27Andrew Bmy_custom_pc_x64
12815048016712780759546943
7B2D0D561D3F30__no


P-1 factor-bounds graph:
B1 = 65000, B2 = 1121250 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 25000, B2 = 356250 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
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109
1010
1011
1012
TF factor-bounds graph:
267
265
264
263
250
260
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280
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2100
Last modified: 2018-07-07T23:56:27+00:00