is 2 5628113 - 1
has 1694231 decimal digits
takes 0.889 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L25600ECB498EE56Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.279665.6716%6500010237500.02682.4155%5.306466.5008%0.8292%
PrimeNet2620.109262.9032%240005500000.01213.1734%0.121264.0804%1.1772%
GPU722662.624065.1515%360007000000.01652.1918%2.640665.9153%0.7638%
Difference+1+2.6555+0.5201%+29000+323750+0.0103+0.2237%+2.6658+0.5855%+0.5855%

Known prime factors (1 factor, 72.7 bits, 0.00129262% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
562811379415768943513093639372272.750705527491572336
24 × 3 × 23 × 639064756859
2015-09-0123639064756859239.677,972.614,891

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-06-06T07:35:00Carsten Kossendeyleela30000397500---0.011--1.571%
2011-01-19T03:24:00harleeP4_2600650001023750---0.027--2.415%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-09-20T00:00:00ANONYMOUSv4_computers21262--0.109--
2009-02-08T05:27:00GrunwalderGIMPManual testing262263--0.174--
2014-11-15T13:11:00NesowaManual testing263264--0.349--
2014-11-17T00:17:00monstManual testing264265--0.664--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.961 GHz-days
Estimated T-Level:0.200
DigitsB1CurvesCompleteFacMiss
20110004 / 1000.04096.060%
25500004 / 2800.01498.579%

New Calculation Method

Total ECM effort:0.961 GHz-days
Estimated T-Level:0.200
DigitsB1CompleteFacMiss
20110000.15485.740%
25500000.01498.587%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.720
50000500000010.240


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-06T00:00:00ANONYMOUSv4_computers25600ECB498EE56F0.889
2000-10-07T00:00:00ANONYMOUSv4_computers25600ECB498EE56F0.889


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:46:06kkmrkkblmbrbkManual testing
7941576894351309363937
E4C161D6655844__no
2018-07-15T04:14:55Oliver KruseGTX-4
7941576894351309363937
E4C161D6655844__no


P-1 factor-bounds graph:
B1 = 65000, B2 = 1023750 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 30000, B2 = 397500 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
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1010
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TF factor-bounds graph:
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263
262
250
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2100
Last modified: 2018-07-15T04:14:55+00:00