is 2 5479807 - 1
has 1649587 decimal digits
takes 0.865 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L843BF7276965AFA9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.422465.6716%5000050000000.07323.2142%5.495666.7750%1.1034%
PrimeNet2620.112162.9032%240005500000.01213.1594%0.124264.0752%1.1720%
GPU722662.695165.1515%340006500000.01552.1118%2.710565.8874%0.7359%
Difference+1+2.7274+0.5201%+16000+4350000+0.0577+1.1024%+2.7851+0.8876%+0.8876%

Known prime factors (2 factors, 134.8 bits, 0.00245962% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
54798071176945765200589545932166.67410738934466128
24 × 11 × 5521 × 11051743
2020-07-215521110517434.43540.13910.2575
54798073183262597074517988232168.10929045389710573
32 × 8699 × 370992703
2015-05-12869937099270318.8894.63028.6444

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
54798073746527433148284534586748455582672784403941134.783
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-07-12T00:00:00ANONYMOUSv4_computers25000225000---0.008--1.254%
2001-01-28T00:00:00ANONYMOUSv4_computers2000060000---0.005--0.719%
2010-11-14T15:42:00Squeeky_SquirrelP4_260060000975000---0.025--2.338%
unknown500005000000---0.073--3.214%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-23T00:00:00kevshawv4_computers21262--0.112--
2009-05-03T17:14:00GrunwalderGIMPManual testing262263--0.179--
2014-12-30T00:32:00snme2pm1Manual testing263264--0.358--
2014-12-30T11:57:00monstManual testing264265--0.682--
2022-06-22T06:41:36LordJuliusManual testing265266--1.364--
2020-07-21T10:06:52TJAOIManual testing266267*66.674211.7401.7583.535


ECM factoring results:

Old Calculation Method

Total ECM effort:0.720 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.720 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000030.720


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-09-13T00:00:00ANONYMOUSv4_computers843BF7276965AFA90.865
2001-04-15T00:00:00ANONYMOUSv4_computers843BF7276965AFA90.865


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-04T17:46:21Oliver KruseGTX-2
318326259707451798823
7591CD5B2FDB0B__no
2018-03-20T01:17:42kkmrkkblmbrbkold
318326259707451798823
7591CD5B2FDB0B__no
2020-07-21T18:58:43ATHec2-PRPCF
117694576520058954593
318326259707451798823
7591CD5B2FDB0BBDno


P-1 factor-bounds graph:
B1 = 50000, B2 = 5000000 (P-1 stage 2)
B1 = 60000, B2 = 975000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 25000, B2 = 225000 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
B1 = 20000, B2 = 60000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2022-06-22T06:41:36+00:00