is 2 4812061 - 1
has 1448575 decimal digits
takes 0.634 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L4F7F665FA6E5F046double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2676.174965.6716 %2600001677507301.79187.5578 %7.966768.2661 %
Target2651.516164.6154 %3200032500000.03962.3232 %1.555765.4374 %
Difference+2+4.6588+1.0563 %+228000+164500730+1.7522+5.2346%+6.4110+2.8287 %

Known prime factors (2 factors, 160.9 bits, 0.00334416% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4812061101144123933999529912063.1331050943908795
3 × 5 × 11 × 19 × 4943 × 67819
2009-09-104943678190.55020.00160.0019
48120612739832777148607502051761002173097.79028468391996159312008428
22 × 32 × 8221 × 94811 × 179999 × 5636467
2022-10-2817999956364671.012e+100.09110.1095

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-09-10Carsten Kossendeymother2063.1330.0100.000%
2022-10-28USAFSS6917th_Scty_Sq26000016775073023097.7902.1499.062%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-06-07ANONYMOUSv4_computers212610.032


ECM factoring results:
Total ECM effort:0.595 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.595


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13ANONYMOUSv4_computers4F7F665FA6E5F0460.634
2000-03-22ANONYMOUSv4_computers4F7F665FA6E5F0460.634


PRP results:
dateuseridcompidcofactorsres64
2017-11-19kkmrkkblmbrbkc4.xlarge
10114412393399952991
6D21D103FC6B6470
2018-03-25treborLaptop
10114412393399952991
6D21D103FC6B6470
2022-11-04junkman2usaTest-Node
10114412393399952991
273983277714860750205176100217
6D21D103FC6B6470


CERT results:
No CERT results for M4812061


P-1 factor-bounds graph:
B1 = 260000, B2 = 167750730 (P-1 stage 2)
B1 = 260000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
261
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
280
290
2100
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Last modified: 2024-03-13T02:15:48+00:00