is 2 4853111 - 1
has 1460932 decimal digits
takes 0.673 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
Actual2676.122765.6716 %2560001055220601.20417.0898 %7.326868.1054 %
Target2651.503364.6154 %3200032500000.04172.3265 %1.545065.4386 %
Difference+2+4.6194+1.0563 %+224000+102272060+1.1625+4.7633%+5.7818+2.6668 %

Known prime factors (2 factors, 98.9 bits, 0.00203856% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
485311113976959691030.380144
24 × 32
-993.039e-111.809e-63.681e-6
48531114330070314869032747212168.55344611284543760
24 × 5 × 11 × 23 × 31 × 71100479
2019-07-03317110047919.9070.77861.4542

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2023-08-08USAFSS6917th_Scty_Sq256000105522060
skipped known factor: 1397695969
skipped known factor: 433007031486903274721
--1.2048.529%


Trial Factoring results:
5758596061626364656667
No TF results for M4853111


ECM factoring results:
Total ECM effort:0.628 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.628


Lucas-Lehmer results:
No L-L results for M4853111


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
1397695969
0A108DFE42D6BBFB
2018-03-30Oliver KruseGTX-5
1397695969
0A108DFE42D6BBFB
2019-07-03Niels_Mache_NextcloudSuperDry3
1397695969
433007031486903274721
CA54AD69E890253D
2019-07-04marssystemssystem11
1397695969
433007031486903274721
CA54AD69E890253D


CERT results:
No CERT results for M4853111


P-1 factor-bounds graph:
B1 = 256000, B2 = 105522060 (P-1 stage 2)
B1 = 256000 (P-1 stage 1)
100
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102
103
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105
106
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
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Last modified: 2024-03-13T02:15:48+00:00