is 2 4764217 - 1
has 1434173 decimal digits
takes 0.627 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
Actual2676.236965.6716 %240000919917601.00026.8729 %7.237168.0310 %
Target2651.531464.6154 %3000032500000.03922.2838 %1.570665.4235 %
Difference+2+4.7055+1.0563 %+210000+88741760+0.9610+4.5892%+5.6665+2.6075 %

Known prime factors (2 factors, 52.3 bits, 0.00109723% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
476421728585303824.7693
3
-134.694e-132.117e-73.885e-7
4764217190568681927.50620
22 × 5
2008-09-08453.769e-127.741e-71.554e-6

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2023-10-08USAFSSUSAFSACS24000091991760
skipped known factor: 28585303
skipped known factor: 190568681
--1.0008.285%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-08Will EdgingtonManual testing??
27.506
9


ECM factoring results:
Total ECM effort:0.593 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.593


Lucas-Lehmer results:
No L-L results for M4764217


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
190568681
28585303
876ADB2AF418D649
2018-03-17ATHec2-PRPCFDC
28585303
190568681
876ADB2AF418D649


CERT results:
No CERT results for M4764217


P-1 factor-bounds graph:
B1 = 240000, B2 = 91991760 (P-1 stage 2)
B1 = 240000 (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: 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