is 2 5559473 - 1
has 1673569 decimal digits
takes 0.878 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L72DDA9DC71823700double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.344765.6716%5000050000000.07323.2214%5.417966.7775%1.1058%
PrimeNet2620.110562.9032%240005500000.01213.1669%0.122664.0781%1.1748%
GPU722662.656465.1515%340007000000.01612.1575%2.672565.9034%0.7519%
Difference+1+2.6883+0.5201%+16000+4300000+0.0571+1.0639%+2.7454+0.8741%+0.8741%

Known prime factors (1 factor, 90.7 bits, 0.00163099% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
555947319759886858168091744743284572890.675177713668707160658436
22 × 32 × 7 × 13 × 23 × 47 × 263 × 190807524437
2015-06-3026319080752443760,682,7362,380.44,445.9

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-11-05T00:00:00ANONYMOUSv4_computers2000020000---0.005--0.377%
2010-05-04T00:27:00Squeeky_SquirrelP4_2600650001121250---0.028--2.466%
unknown500005000000---0.073--3.221%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-04-23T19:21:00GrunwalderGIMPManual testing262263--0.177--
2014-12-16T20:34:00NesowaManual testing263264--0.353--
2014-12-17T02:12:00monstManual testing264265--0.672--


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)
1999-08-31T00:00:00ANONYMOUSv4_computers72DDA9DC718237000.878
2001-02-04T00:00:00ANONYMOUSv4_computers72DDA9DC718237000.878


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T17:00:26kkmrkkblmbrbkManual testing
1975988685816809174474328457
15D537EDDF39D3__no
2018-07-07T09:15:47BattlemaxxWork-3
1975988685816809174474328457
15D537EDDF39D3__no


P-1 factor-bounds graph:
B1 = 50000, B2 = 5000000 (P-1 stage 2)
B1 = 65000, B2 = 1121250 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
101
102
103
104
105
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
265
264
263
250
260
270
280
290
2100
Last modified: 2018-07-07T09:15:47+00:00