is 2 1922119 - 1
has 578616 decimal digits
takes 0.104 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
Actual26715.458968.6567 %500000150000000.10155.0986 %15.560470.2548 %
Target2610.159865.5738 %100008500000.00441.7619 %0.164266.1803 %
Difference+6+15.2991+3.0829 %+490000+14150000+0.0971+3.3367%+15.3962+4.0745 %

Known prime factors (3 factors, 148.7 bits, 0.00773480% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1922119123015617926.87432
25
-32324.683e-122.517e-65.123e-6
1922119180753802659591444.0394701941
61 × 77081
2008-08-2661770812.117e-60.00030.0006
19221192556809122231038398895372477.75966510167222503872
26 × 32 × 7 × 19 × 199 × 1811 × 2409031
2015-10-041811240903116,7930.01050.0193

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-10-04alpertronManual testing500000150000001222477.7590.1018.912%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-08-26ANONYMOUSManual testing??
44.039
14


ECM factoring results:
Total ECM effort:39.804 GHz-days
Estimated T-Level:25.711
DigitsB1CompleteFacMiss
201100015.0070.000%
25500001.68318.581%
302500000.14286.745%
3510000000.01099.030%


ECM Summary

B1B2factorcurvesGHz-days
500005000070.293
500005000000271.875
500006361959141.079
50000660000020816.30
250000400000004720.25


Lucas-Lehmer results:
No L-L results for M1922119


PRP results:
dateuseridcompidcofactorsres64
2017-09-30alpertronManual testing
123015617
18075380265959
255680912223103839889537
8BEFFD41E3FB1CEF
2017-10-20Oliver KruseThreadripper-PC
123015617
18075380265959
255680912223103839889537
8BEFFD41E3FB1CEF


CERT results:
No CERT results for M1922119


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00