is 2 1465481 - 1
has 441154 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.275968.6567%500000150000000.07144.9345%20.347370.2033%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+20.1711+3.6567%+493500+14900000+0.0708+3.4883%+20.2419+4.6972%+4.6972%

Known prime factors (1 factor, 52.8 bits, 0.00360244% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
146548178035252481213671652.7932662445043
32 × 103 × 2872109
-10328721090.00070.00870.0162

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:14:41alpertronManual testing5000001500000012-
skipped known factor: 7803525248121367
--0.071--4.934%


Trial Factoring results:
No TF results for M1465481


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:
No L-L results for M1465481


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T03:50:48Oliver KruseGTX-0
7803525248121367
3E9B817379AADB__no
2017-10-28T00:03:50kkmrkkblmbrbkc4.xlarge
7803525248121367
3E9B817379AADB__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
250
260
270
280
290
2100
Last modified: 2022-01-18T14:05:44+00:00