is 2 3915013 - 1
has 1178537 decimal digits
takes 0.488 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26815.224767.6471 %1000001303648501.30165.4477 %16.526369.4096 %
Target2640.909165.6250 %2600025000000.02912.2795 %0.938266.4086 %
Difference+4+14.3155+2.0221 %+74000+127864850+1.2725+3.1683%+15.5881+3.0010 %

Known prime factors (2 factors, 103.8 bits, 0.00265049% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3915013255806949431134.5743267
33 × 112
-1211219.980e-102.188e-54.453e-5
39150136746821488035554994712169.19386166016409595
3 × 5 × 173 × 691 × 2207 × 21773
2019-04-0822072177346.0620.00060.0008

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-04-08JossManual testing200004000022169.1930.0040.884%
2022-03-02JossManual testing9000090000
skipped known factor: 25580694943
skipped known factor: 674682148803555499471
--0.0141.472%
2022-03-22JossManual testing100000100000
skipped known factor: 25580694943
skipped known factor: 674682148803555499471
--0.0161.555%
2022-05-20JossManual testing100000130364850
skipped known factor: 25580694943
skipped known factor: 674682148803555499471
--1.3028.160%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2022-03-26JossManual testing267268


ECM factoring results:
Total ECM effort:0.474 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.474


Lucas-Lehmer results:
No L-L results for M3915013


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
25580694943
AE7CEC3EA1A7D85C
2017-12-29Oliver KruseGTX-2
25580694943
AE7CEC3EA1A7D85C
2019-04-08ATHec2-PRPCF
25580694943
674682148803555499471
6078ED7E5A3BD809
2019-04-09marssystemsSystem01
25580694943
674682148803555499471
6078ED7E5A3BD809


CERT results:
No CERT results for M3915013


P-1 factor-bounds graph:
B1 = 100000, B2 = 130364850 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 20000, B2 = 40000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
101
102
103
104
105
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
268
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00