is 2 1465487 - 1
has 441156 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBE3D9DC11E260067double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.275868.6567%800000160000000.09015.2630%20.365970.3063%1.6496%
PrimeNet2560.006662.5000%70001200000.00072.9101%0.007363.5913%1.0913%
GPU722600.104865.0000%65001000000.00061.4461%0.105465.5061%0.5061%
Difference+7+20.1710+3.6567%+793500+15900000+0.0895+3.8169%+20.2605+4.8002%+4.8002%

Known prime factors (1 factor, 68.6 bits, 0.00468403% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14654874611796604128227988012168.644157346895746200
23 × 52 × 6221 × 126464311
2014-11-29622112646431142.0850.38180.7124

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000265000---0.002--0.956%
2009-04-13T05:55:00axnManual testing80000016000000---0.090--5.263%
2016-03-17T19:14:41alpertronManual testing5000001500000012---0.071--4.934%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-06T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2010-05-07T04:20:00Architects Cubeda3_bu2260261--0.105--
2011-04-05T20:59:00GrunwalderGIMPManual testing21263--1.089--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.582 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.582 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025011.86
50000500000010.047
250000350000005013.68


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computersBE3D9DC11E2600670.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T03:56:13Oliver KruseGTX-2
461179660412822798801
132C62D0726C9C__no
2017-10-28T00:56:08kkmrkkblmbrbkc4.xlarge
461179660412822798801
132C62D0726C9C__no


P-1 factor-bounds graph:
B1 = 800000, B2 = 16000000 (P-1 stage 2)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 800000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 20000, B2 = 265000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
263
261
258
257
250
260
270
280
290
2100
Last modified: 2022-01-25T11:44:09+00:00