is 2 1829747 - 1
has 550809 decimal digits
takes 0.099 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
Actual26716.239468.6567 %500000150000000.10155.0685 %16.340870.2453 %
Target2610.167965.5738 %90007000000.00371.5946 %0.171666.1227 %
Difference+6+16.0715+3.0829 %+491000+14300000+0.0978+3.4739%+16.1693+4.1226 %

Known prime factors (1 factor, 25.4 bits, 0.00138752% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
182974743913929825.38812
22 × 3
-442.449e-123.146e-76.404e-7

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012
skipped known factor: 43913929
---8.864%


Trial Factoring results:
5758596061626364656667
No TF results for M1829747


ECM factoring results:
Total ECM effort:39.014 GHz-days
Estimated T-Level:25.703
DigitsB1CompleteFacMiss
201100015.1310.000%
25500001.68218.609%
302500000.14186.882%
3510000000.01099.050%


ECM Summary

B1B2factorcurvesGHz-days
500005000000372.556
50000660000022117.21
250000400000004519.25


Lucas-Lehmer results:
No L-L results for M1829747


PRP results:
dateuseridcompidcofactorsres64
2017-10-04Oliver KruseGTX-3
43913929
7526A7E83512B144
2017-11-06ATHec2-1xh
43913929
7526A7E83512B144


CERT results:
No CERT results for M1829747


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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102
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104
105
106
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108
TF factor-bounds graph:
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00