is 2 4991339 - 1
has 1502543 decimal digits
takes 0.692 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9EB63C08D8E07D48double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.953165.6716%30000093750000.15974.9254%6.112867.3624%1.6908%
PrimeNet2610.061562.2951%220004500000.00913.3123%0.070763.5440%1.2489%
GPU722651.461764.6154%340007000000.01412.4153%1.475865.4700%0.8546%
Difference+2+4.4914+1.0563%+266000+8675000+0.1455+2.5101%+4.6370+1.8924%+1.8924%

Known prime factors (1 factor, 73.3 bits, 0.00146794% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4991339113866353104312450238712373.2701140639346519165
5 × 67 × 4423 × 769815413
2017-06-054423769815413654.098.430515.744

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-04-01T00:00:00ANONYMOUSv4_computers25000306250---0.008--1.355%
2001-05-13T00:00:00ANONYMOUSv4_computers2000020000---0.004--0.368%
2002-01-15T00:00:00ANONYMOUSv4_computers25000306250---0.008--1.355%
2011-07-06T11:43:00Squeeky_SquirrelT7500_220060000990000---0.022--2.312%
2011-12-13T18:56:00Squeeky_SquirrelT7500_22001200002430000---0.049--3.258%
2017-02-05T16:36:38Squeeky_Squirreli5-5250U_1600300000937500012---0.160--4.925%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-04-21T00:00:00ANONYMOUSv4_computers21261--0.062--
2008-09-04T21:20:00Sturle Sundelara261262--0.062--
2011-09-03T15:38:00GrunwalderGIMPManual testing21263--0.320--
2016-02-23T16:39:06Mark RoseManual testing262263--0.197--
2014-11-07T08:15:00lycornManual testing263264--0.393--
2014-11-07T08:15:00lycornManual testing264265--0.749--
2015-07-31T23:30:00snme2pm1Manual testing265266--1.497--
2017-05-21T08:22:47YxinityManual testing266267--2.994--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.475 GHz-days
Estimated T-Level:0.350
DigitsB1CurvesCompleteFacMiss
20110007 / 1000.07093.207%
25500007 / 2800.02597.527%

New Calculation Method

Total ECM effort:1.475 GHz-days
Estimated T-Level:0.350
DigitsB1CompleteFacMiss
20110000.22679.787%
25500000.02097.980%
302500000.00199.874%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.264
50000500000010.211


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-20T00:00:00ANONYMOUSv4_computers943A692A40A080__0.692
2000-04-19T00:00:00ANONYMOUSv4_computers39C896116502AE__0.692
2001-04-15T00:00:00ANONYMOUSv4_computers9EB63C08D8E07D480.692
2002-01-15T00:00:00ANONYMOUSv4_computers9EB63C08D8E07D480.692


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T13:09:05alpertronManual testing
11386635310431245023871
AAF24C94D6F0BE__no
2018-01-11T15:56:46kkmrkkblmbrbkold
11386635310431245023871
AAF24C94D6F0BE__no


P-1 factor-bounds graph:
B1 = 300000, B2 = 9375000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 120000, B2 = 2430000 (P-1 stage 2)
B1 = 120000 (P-1 stage 1)
B1 = 60000, B2 = 990000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 25000, B2 = 306250 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2018-01-11T15:56:46+00:00