is 2 2492447 - 1
has 750302 decimal digits
takes 0.173 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
Actual26711.921667.1642 %2000000600000000.51907.6448 %12.440569.6744 %
Target2630.640365.0794 %110008000000.00541.3812 %0.645865.5617 %
Difference+4+11.2812+2.0848 %+1989000+59200000+0.5135+6.2636%+11.7948+4.1127 %

Known prime factors (1 factor, 26.8 bits, 0.00107662% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2492447119637457926.83424
23 × 3
-883.606e-128.046e-71.637e-6

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-07-04alpertronManual testing20000006000000012
skipped known factor: 119637457
---10.561%


Trial Factoring results:
5758596061626364656667
No TF results for M2492447


ECM factoring results:
Total ECM effort:12.350 GHz-days
Estimated T-Level:21.261
DigitsB1CompleteFacMiss
20110002.6157.314%
25500000.25277.707%
302500000.01698.383%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.276
50000242948585012.07


Lucas-Lehmer results:
No L-L results for M2492447


PRP results:
dateuseridcompidcofactorsres64
2017-10-15kkmrkkblmbrbkc4.xlarge
119637457
24E2539A868B99D7
2017-11-07Oliver KruseGTX-3
119637457
24E2539A868B99D7


CERT results:
No CERT results for M2492447


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
100
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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=21.26 ~= 54-bit
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Last modified: 2024-03-13T02:15:48+00:00