is 2 1508413 - 1
has 454078 decimal digits
takes 0.067 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
Actual26719.698868.6567%500000150000000.08354.9517%19.782370.2088%1.5520%
PrimeNet2570.012763.1579%65001000000.00082.3430%0.013564.0211%0.8632%
GPU722610.203665.5738%6000500000.00050.9491%0.204265.9005%0.3268%
Difference+6+19.4951+3.0829%+494000+14950000+0.0830+4.0026%+19.5782+4.3082%+4.3082%

Known prime factors (2 factors, 123.7 bits, 0.00819958% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
150841318652965258141591650.728618297683
179 × 293 × 11789
-293117890.00025.954e-57.767e-5
150841391561713980895968248332272.9553035034635106432
27 × 3 × 7 × 29 × 199 × 195651559
2019-05-171991956515591,072.10.69041.2895

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
15084131707897469861549594530925666663421044738123.684
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:15:38alpertronManual testing5000001500000012-
skipped known factor: 1865296525814159
--0.084--4.952%


Trial Factoring results:
No TF results for M1508413


ECM factoring results:

Old Calculation Method

Total ECM effort:30.079 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:30.079 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001045.798
5000050000001478.195
250000350000005016.09


Lucas-Lehmer results:
No L-L results for M1508413


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T11:03:38Oliver KruseGTX-3
1865296525814159
7385B86A6225A4__no
2017-10-29T10:39:04kkmrkkblmbrbkc4.xlarge
1865296525814159
7385B86A6225A4__no
2019-05-17T13:57:19ATHec2-PRPCF
1865296525814159
9156171398089596824833
636B90FA8E788E6Eno
2019-05-23T04:07:16krackerGRID-11
1865296525814159
9156171398089596824833
636B90FA8E788E6Eno


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
109
TF factor-bounds graph:
267
250
260
270
280
290
2100
Last modified: 2022-03-17T11:20:44+00:00