is 2 1002917 - 1
has 301909 decimal digits
takes 0.030 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LA0DB5B6F123F96EFdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26729.627570.1493 %1000000011100000003.005411.7616 %32.632973.6602 %
Target2600.153166.6667 %4500800000.00040.5774 %0.153566.8591 %
Difference+7+29.4744+3.4826 %+9995500+1109920000+3.0050+11.1842%+32.4794+6.8010 %

Known prime factors (1 factor, 72.9 bits, 0.00726799% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
100291787628550060344997090812272.8924368684051638620
22 × 5 × 72 × 193 × 92317 × 250199
2009-06-0692317250199953.550.00430.0081

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-10-28ANONYMOUSv4_computers500001000000--0.0044.093%
2003-11-16ANONYMOUSv4_computers2048204800--0.0010.939%
2006-01-15Jossv4_computers7800078000--0.0031.860%
2006-01-15Jossv4_computers9800098000--0.0042.079%
2006-01-15Jossv4_computers6000060000--0.0031.625%
2009-06-06Rob_Deetwopc2272.8920.0090.000%
2016-03-17alpertronManual testing3000001000000012
skipped known factor: 8762855006034499709081
---8.110%
2021-06-18ViliamF3100000001110000000
skipped known factor: 8762855006034499709081
--2.59618.442%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-09-22ANONYMOUSv4_computers2562570.010
2002-12-09ANONYMOUSv4_computers212580.038
2022-03-07LordJuliusManual testing258260
2009-02-18Sturle Sundezumthor.ifi2602610.153


ECM factoring results:
Total ECM effort:17.357 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002819.71
25000025000000447.651


Lucas-Lehmer results:
No L-L results for M1002917


PRP results:
dateuseridcompidcofactorsres64
2017-09-28Oliver KruseGTX-2
8762855006034499709081
23AFB9D88730E1E4
2017-10-15Oliver KruseThreadripper-PC
8762855006034499709081
23AFB9D88730E1E4
2017-12-25ATHec2-1xh
8762855006034499709081
23AFB9D88730E1E4


CERT results:
No CERT results for M1002917


P-1 factor-bounds graph:
B1 = 10000000, B2 = 1110000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 50000, B2 = 1000000 (P-1 stage 2)
B1 = 98000 (P-1 stage 1)
B1 = 78000 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
261
260
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
250
260
270
280
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Last modified: 2024-02-09T03:30:02+00:00