is 2 2077939 - 1
has 625522 decimal digits
takes 0.137 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
Actual26714.299768.6567 %500000150000000.12305.1467 %14.422770.2698 %
Target2620.295766.1290 %90006500000.00421.3675 %0.299866.5922 %
Difference+5+14.0040+2.5277 %+491000+14350000+0.1188+3.7792%+14.1228+3.6776 %

Known prime factors (1 factor, 29.9 bits, 0.00144117% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
207793910348136231029.947249
3 × 83
-3833.627e-117.016e-77.917e-7

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012
skipped known factor: 1034813623
---8.219%


Trial Factoring results:
5758596061626364656667
No TF results for M2077939


ECM factoring results:
Total ECM effort:9.453 GHz-days
Estimated T-Level:21.919
DigitsB1CompleteFacMiss
20110004.1281.611%
25500000.38468.130%
302500000.02497.597%
3510000000.00199.886%


ECM Summary

B1B2factorcurvesGHz-days
50000465000080.660
500005000000171.445
500006050000504.612
50000650914270.668
50000679832570.682
50000690000070.687
50000715000070.699


Lucas-Lehmer results:
No L-L results for M2077939


PRP results:
dateuseridcompidcofactorsres64
2017-10-06Oliver KruseGTX-0
1034813623
7B49596FDE9965E3
2017-11-16ATHec2-1xh
1034813623
7B49596FDE9965E3


CERT results:
No CERT results for M2077939


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=21.92 ~= 56-bit
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270
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Last modified: 2024-03-13T02:15:48+00:00