is 2 2409487 - 1
has 725328 decimal digits
takes 0.163 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
Actual26712.332167.1642 %2000000600000000.50557.6183 %12.837569.6657 %
Target2630.662465.0794 %100007000000.00471.2759 %0.667165.5249 %
Difference+4+11.6697+2.0848 %+1990000+59300000+0.5008+6.3425%+12.1705+4.1408 %

Known prime factors (2 factors, 87.7 bits, 0.00363953% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
240948724094871824.5225
5
-159.286e-131.193e-71.994e-7
2409487103891076063774771932063.1722155875422108
22 × 83 × 251 × 379 × 68261
2016-12-28379682611.27760.00040.0007

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-09-28alpertronManual testing20000006000000012
skipped known factor: 24094871
skipped known factor: 10389107606377477193
---10.528%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2016-12-28TJAOIManual testing263264*
63.172
20
0.140


ECM factoring results:
Total ECM effort:6.202 GHz-days
Estimated T-Level:21.162
DigitsB1CompleteFacMiss
20110002.4908.288%
25500000.23279.258%
302500000.01598.533%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.274
500007000000575.927


Lucas-Lehmer results:
No L-L results for M2409487


PRP results:
dateuseridcompidcofactorsres64
2017-10-13Oliver KruseGTX-1
24094871
10389107606377477193
9C6F3573FCED8E14
2017-11-26kkmrkkblmbrbkc4.xlarge
24094871
10389107606377477193
9C6F3573FCED8E14


CERT results:
No CERT results for M2409487


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=21.16 ~= 54-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00