is 2 1465469 - 1
has 441151 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-L78BE330C0D3ECE7Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.276068.6567%500000150000000.07144.9345%20.347570.2033%1.5466%
PrimeNet2560.006662.5000%70001200000.00072.9100%0.007363.5913%1.0913%
GPU722600.104865.0000%65001000000.00061.4461%0.105465.5061%0.5061%
Difference+7+20.1712+3.6567%+493500+14900000+0.0708+3.4883%+20.2420+4.6972%+4.6972%

Known prime factors (1 factor, 57.8 bits, 0.00394262% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14654692470991193373668711857.77884307180615
5 × 7 × 19387 × 124247
2003-07-30193871242470.01960.00140.0022

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:14:41alpertronManual testing5000001500000012-
skipped known factor: 247099119337366871
--0.071--4.934%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-30T00:00:00ANONYMOUSv4_computers??57.778180.0060.1140.013
2001-10-06T00:00:00ANONYMOUSv4_computers21257--0.013--


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
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025111.90
250000350000005013.68


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-17T00:00:00ANONYMOUSv4_computers78BE330C0D3ECE7C0.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T03:53:34Oliver KruseGTX-3
247099119337366871
4EC8B4149AA5A5__no
2017-10-28T00:05:04kkmrkkblmbrbkc4.xlarge
247099119337366871
4EC8B4149AA5A5__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
257
2
250
260
270
280
290
2100
Last modified: 2022-01-18T14:05:43+00:00