is 2 4958579 - 1
has 1492682 decimal digits
takes 0.687 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7309A67C354C07A4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.992465.6716%1200000431000000.70007.4620%6.692468.2332%2.5616%
PrimeNet2610.061962.2951%220004500000.00913.3087%0.071163.5426%1.2475%
GPU722651.471364.6154%340007000000.01412.4126%1.485565.4691%0.8537%
Difference+2+4.5211+1.0563%+1166000+42400000+0.6859+5.0494%+5.2070+2.7641%+2.7641%

Known prime factors (1 factor, 105.6 bits, 0.00213005% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
49585796235034811492694368392157965940732105.6206287118559059656373723357
3 × 313 × 6673 × 118787 × 134293 × 62898841
2015-03-27134293628988413.883e+100.71431.2864

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-04-01T00:00:00Wojciech Florekv4_computers25000187500---0.007--1.159%
2009-12-05T19:43:00markrlounge750001500000---0.031--2.675%
2015-03-27T21:29:00mikrMSI1200000431000001232105.6200.7001.3751.4007.462%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-12-23T13:34:00markrrmst261262--0.062--
2011-09-11T02:16:00GrunwalderGIMPManual testing21263--0.322--
2015-01-02T13:15:00VictordeHollanderManual testing263264--0.396--
2015-01-02T13:15:00VictordeHollanderManual testing264265--0.754--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.262 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:1.262 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.19482.403%
25500000.01798.266%
302500000.00199.892%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.262


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-14T00:00:00ANONYMOUSv4_computers7309A67C354C07A40.687
2000-03-15T00:00:00foxkidv4_computers08790627DE110D__0.687
2001-06-03T00:00:00Wojciech Florekv4_computers7309A67C354C07A40.687


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T18:08:28kkmrkkblmbrbkManual testing
62350348114926943683921579659407
A22E0848221C6B__no
2018-04-18T09:19:29GsSvmain
62350348114926943683921579659407
A22E0848221C6B__no


P-1 factor-bounds graph:
B1 = 1200000, B2 = 43100000 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 75000, B2 = 1500000 (P-1 stage 2)
B1 = 75000 (P-1 stage 1)
B1 = 25000, B2 = 187500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
267
265
264
263
262
250
260
270
280
290
2100
2110
Last modified: 2018-04-18T09:19:29+00:00